21 books like Practical Object-Oriented Design in Ruby

By Sandi Metz,

Here are 21 books that Practical Object-Oriented Design in Ruby fans have personally recommended if you like Practical Object-Oriented Design in Ruby. Shepherd is a community of 11,000+ authors and super readers sharing their favorite books with the world.

Shepherd is reader supported. When you buy books, we may earn an affiliate commission.

Book cover of The Mythical Man-Month: Essays on Software Engineering

Paolo Perrotta Author Of Programming Machine Learning: From Coding to Deep Learning

From my list on classic software that are still worth reading.

Why am I passionate about this?

You know what ages like milk? Programming books. I always cringe when someone glances at my programming bookshelf. Some of those books are so dated, they make me appear out of touch by association. Sometimes, I feel compelled to justify myself. “Yes, that's the first edition of Thinking in Java I keep it for nostalgic reasons, you know!” Yesterday’s software book is today’s fish and chip wrapper. However, there are exceptions. A few classics stay relevant for years, or even decades. This is a shortlist of software books that might be older than you, but are still very much worth reading.

Paolo's book list on classic software that are still worth reading

Paolo Perrotta Why did Paolo love this book?

In my consulting gigs, I come across plenty of clueless remarks. Here's a classic one: “We're falling behind schedule, so let's hire more coders.” Or a more recent gem: “We'll be ten times more productive if we generate code with AI.”

When I encounter such nonsense, I don't facepalm or cringe. Instead, I put on my poker face and drop a quote from The Mythical Man-Month.

In an industry where last year’s book is already outdated, Fred Brooks' collection of essays has been a guiding light for nearly half a century. His aphorisms have become legendary. “The bearing of a child takes nine months, no matter how many women are assigned.” “Adding manpower to a late software project makes it later.” “There is no silver bullet.” The list goes on and on.

John Carmack, one of the greatest programmers of our times, used to revisit this book every year or…

By Frederick P. Brooks Jr,

Why should I read it?

5 authors picked The Mythical Man-Month as one of their favorite books, and they share why you should read it.

What is this book about?

Few books on software project management have been as influential and timeless as The Mythical Man-Month. With a blend of software engineering facts and thought-provoking opinions, Fred Brooks offers insight for anyone managing complex projects. These essays draw from his experience as project manager for the IBM System/360 computer family and then for OS/360, its massive software system. Now, 20 years after the initial publication of his book, Brooks has revisited his original ideas and added new thoughts and advice, both for readers already familiar with his work and for readers discovering it for the first time.



The added chapters…


Book cover of The Pragmatic Programmer: Your Journey to Mastery

Chris Zimmerman Author Of The Rules of Programming: How to Write Better Code

From my list on programming for people who want to be good at it.

Why am I passionate about this?

I’ve spent most of my life writing code—and too much of that life teaching new programmers how to write code like a professional. If it’s true that you only truly understand something after teaching it to someone else, then at this point I must really understand programming! Unfortunately, that understanding has not led to an endless stream of bug-free code, but it has led to some informed opinions on programming and books about programming.

Chris' book list on programming for people who want to be good at it

Chris Zimmerman Why did Chris love this book?

This book’s title is absolutely perfect! There’s no agenda here other than identifying things that will make you a more effective and productive programmer.

That leads to a book packed with solid advice, whether it’s about how to write code or how to think about your career. The authors are consultants, so there are plenty of clear and interesting examples drawn from many different problem domains. That’s super fun for someone like me who’s hyper-focused on a single kind of programming.

By David Thomas, Andrew Hunt,

Why should I read it?

4 authors picked The Pragmatic Programmer as one of their favorite books, and they share why you should read it.

What is this book about?

"One of the most significant books in my life." -Obie Fernandez, Author, The Rails Way

"Twenty years ago, the first edition of The Pragmatic Programmer completely changed the trajectory of my career. This new edition could do the same for yours." -Mike Cohn, Author of Succeeding with Agile , Agile Estimating and Planning , and User Stories Applied

". . . filled with practical advice, both technical and professional, that will serve you and your projects well for years to come." -Andrea Goulet, CEO, Corgibytes, Founder, LegacyCode.Rocks

". . . lightning does strike twice, and this book is proof." -VM…


Book cover of Patterns of Enterprise Application Architecture

Paolo Perrotta Author Of Programming Machine Learning: From Coding to Deep Learning

From my list on classic software that are still worth reading.

Why am I passionate about this?

You know what ages like milk? Programming books. I always cringe when someone glances at my programming bookshelf. Some of those books are so dated, they make me appear out of touch by association. Sometimes, I feel compelled to justify myself. “Yes, that's the first edition of Thinking in Java I keep it for nostalgic reasons, you know!” Yesterday’s software book is today’s fish and chip wrapper. However, there are exceptions. A few classics stay relevant for years, or even decades. This is a shortlist of software books that might be older than you, but are still very much worth reading.

Paolo's book list on classic software that are still worth reading

Paolo Perrotta Why did Paolo love this book?

If one author influenced my way of thinking about software, that’s Martin Fowler. From planning to architectures, his insights are embedded in every line of code I write. I was certain that one of his books would make my list.

But which one? Let’s face it–many of Fowler's books feel dated today. Not because his ideas became obsolete, but because they're now taken for granted. Who needs to re-read a book like Refactoring, when we all have a refactoring menu at our fingertips?

So I settled on this book. It’s a catalog of patterns, but one of the best. And don’t be misled by the word “enterprise” in the title: even lightweight patterns such as Active Record were popularized by this book.

Whether or not you work in a large company, this is still an essential collection of knowledge, written in Fowler’s signature clean style.

By Martin Fowler,

Why should I read it?

1 author picked Patterns of Enterprise Application Architecture as one of their favorite books, and they share why you should read it.

What is this book about?

The practice of enterprise application development has benefited from the emergence of many new enabling technologies. Multi-tiered object-oriented platforms, such as Java and .NET, have become commonplace. These new tools and technologies are capable of building powerful applications, but they are not easily implemented. Common failures in enterprise applications often occur because their developers do not understand the architectural lessons that experienced object developers have learned.

Patterns of Enterprise Application Architecture is written in direct response to the stiff challenges that face enterprise application developers. The author, noted object-oriented designer Martin Fowler, noticed that despite changes in technology--from Smalltalk to…


Book cover of Head First Design Patterns: A Brain-Friendly Guide

Paolo Perrotta Author Of Programming Machine Learning: From Coding to Deep Learning

From my list on classic software that are still worth reading.

Why am I passionate about this?

You know what ages like milk? Programming books. I always cringe when someone glances at my programming bookshelf. Some of those books are so dated, they make me appear out of touch by association. Sometimes, I feel compelled to justify myself. “Yes, that's the first edition of Thinking in Java I keep it for nostalgic reasons, you know!” Yesterday’s software book is today’s fish and chip wrapper. However, there are exceptions. A few classics stay relevant for years, or even decades. This is a shortlist of software books that might be older than you, but are still very much worth reading.

Paolo's book list on classic software that are still worth reading

Paolo Perrotta Why did Paolo love this book?

If you check out Amazon’s best selling books on object-oriented design, you might see a relic from 1995 still hanging near the top: "Design Patterns". That book transformed software design. Its four authors will forever be known to my generation as the “Gang of Four".

Some of the original patterns may feel outdated today, but others remain essential. Pity that the book itself is such a tough read. Good thing that another "gang of four”, spearheaded by the excellent Kathy Sierra, gave us this lighthearted take on the original patterns.

The Design Patterns book was a densely packed truck of ideas. By comparison, Head First Design Patterns is a whimsical bumper car. It’s quirky and accessible, which some serious programmers found off-putting: “It’s a book for teenagers!“, they griped.

Yes, it’s not for everybody. But it’s fun, unassuming, and it teaches important concepts. So it makes my list.

By Eric Freeman, Elisabeth Robson, Kathy Sierra , Bert Bates

Why should I read it?

1 author picked Head First Design Patterns as one of their favorite books, and they share why you should read it.

What is this book about?

You're not alone. At any given moment, somewhere in the world someone struggles with the same software design problems you have. You know you don't want to reinvent the wheel (or worse, a flat tire), so you look to Design Patterns--the lessons learned by those who've faced the same problems. With Design Patterns, you get to take advantage of the best practices and experience of others, so that you can spend your time on...something else. Something more challenging. Something more complex. Something more fun. You want to learn about the patterns that matter--why to use them, when to use them,…


Book cover of Smalltalk Best Practice Patterns

Philipp Fehre Author Of JavaScript Domain-Driven Design

From my list on learning from programming classics.

Why am I passionate about this?

Computers have fascinated me since my childhood, having fond memories of my dad's ZX81, but even so I played around I was never truly captured by the programming until I recognized it as a way of writing rather than raw engineering. Through my studies of media sciences I found my fascination with how language can shape perception, and through my work in developer advocacy, I found how communities are shaped as well. Now I am fascinated with how different programming languages can shape thinking, having had the opportunity to solve problems at large companies in nonmainstream languages.

Philipp's book list on learning from programming classics

Philipp Fehre Why did Philipp love this book?

Smalltalk is not as common or popular as it once was, but the influence its design had on programming is hard to overstate.

Reading this book has changed how I think about object orientation, and how I design systems, learning the patterns of Smalltalk makes it clear what object oriented design is really intended to achieve.

By Kent Beck,

Why should I read it?

2 authors picked Smalltalk Best Practice Patterns as one of their favorite books, and they share why you should read it.

What is this book about?

This classic book is the definitive real-world style guide for better Smalltalk programming. This author presents a set of patterns that organize all the informal experience successful Smalltalk programmers have learned the hard way. When programmers understand these patterns, they can write much more effective code. The concept of Smalltalk patterns is introduced, and the book explains why they work. Next, the book introduces proven patterns for working with methods, messages, state, collections, classes and formatting. Finally, the book walks through a development example utilizing patterns. For programmers, project managers, teachers and students -- both new and experienced. This book…


Book cover of Design Patterns: Elements of Reusable Object-Oriented Software

Federico Kereki Author Of Mastering JavaScript Functional Programming: Write clean, robust, and maintainable web and server code using functional JavaScript and TypeScript

From my list on the theory and practice of computer programming.

Why am I passionate about this?

I have been working with computers for decades now – having started with programmable handheld calculators and working my way up and down through mainframes, mini- and micro-computers. I always thought there is an art to writing software, and that good software can be read and admired. Maintainability, readability, and testability are some core needs for software, and after going through many programming paradigms, I feel that functional programming (FP) is the way to go – and several modern web frameworks agree. JavaScript (and now, TypeScript) are essential to web development, and I wanted to show how FP could be successfully used with those languages, and thus my book.

Federico's book list on the theory and practice of computer programming

Federico Kereki Why did Federico love this book?

Of all the books I recommend, this is practically a sort of personal bible, which I very frequently consult.

This book doesn't just show you how to code; with realistic patterns and real-world examples, it's like having experienced mentors guiding your every keystroke. These patterns aren't just snippets; they're blueprints for building robust, flexible software.

I think the book is practically mandatory for all developers, novice or seasoned. It transformed how I approach problems, teaching me techniques I use daily in systems design and development.

By Erich Gamma, Richard Helm, Ralph Johnson , John Vlissides

Why should I read it?

1 author picked Design Patterns as one of their favorite books, and they share why you should read it.

What is this book about?

Capturing a wealth of experience about the design of object-oriented software, four top-notch designers present a catalog of simple and succinct solutions to commonly occurring design problems. Previously undocumented, these 23 patterns allow designers to create more flexible, elegant, and ultimately reusable designs without having to rediscover the design solutions themselves.


The authors begin by describing what patterns are and how they can help you design object-oriented software. They then go on to systematically name, explain, evaluate, and catalog recurring designs in object-oriented systems. With Design Patterns as your guide, you will learn how these important patterns fit into the…


Book cover of Practical Object-Oriented Design: An Agile Primer Using Ruby

Jeff Langr Author Of Modern C++ Programming with Test-Driven Development: Code Better, Sleep Better

From my list on doing it right in your programming language.

Why am I passionate about this?

I love computer programming books almost as much as I love computer programming. As a high school student in 1980 I remember typing in really frustrating source code from the book BASIC Computer Games. Was programming meant to be a black art? Was code supposed to be an impenetrable mess of buried intent? When I started getting paid to program, I was happy to see that the answer to both questions was "no." I began to seek and enjoy books that espoused the "right" way to code in a given language. Here is a handful of books that have helped me and countless others learn to produce correct, clear, and maintainable code.

Jeff's book list on doing it right in your programming language

Jeff Langr Why did Jeff love this book?

When learning a new language, you'll want to avoid the mistake of assuming that you can adapt your old way of doing things to your new language (like I first tried many years ago). Even though Java and Ruby are both object-oriented languages, the "right" approach to implementing things is dramatically different between the two. Practical Object-Oriented Design in Ruby makes it easy to learn how to apply object-oriented design and to implement the code properly in Ruby, making your system easier to change as it grows.

By Sandi Metz,

Why should I read it?

1 author picked Practical Object-Oriented Design as one of their favorite books, and they share why you should read it.

What is this book about?

The Complete Guide to Writing Maintainable, Manageable, Pleasing, and Powerful Object-Oriented Applications





Object-oriented programming languages exist to help you create beautiful, straightforward applications that are easy to change and simple to extend. Unfortunately, the world is awash with object-oriented (OO) applications that are difficult to understand and expensive to change. Practical Object-Oriented Design, Second Edition, immerses you in an OO mindset and teaches you powerful, real-world, object-oriented design techniques with simple and practical examples.



Sandi Metz demonstrates how to build new applications that can "survive success" and repair existing applications that have become impossible to change. Each technique is illustrated…


Book cover of Refactoring: Improving the Design of Existing Code

Federico Kereki Author Of Mastering JavaScript Functional Programming: Write clean, robust, and maintainable web and server code using functional JavaScript and TypeScript

From my list on the theory and practice of computer programming.

Why am I passionate about this?

I have been working with computers for decades now – having started with programmable handheld calculators and working my way up and down through mainframes, mini- and micro-computers. I always thought there is an art to writing software, and that good software can be read and admired. Maintainability, readability, and testability are some core needs for software, and after going through many programming paradigms, I feel that functional programming (FP) is the way to go – and several modern web frameworks agree. JavaScript (and now, TypeScript) are essential to web development, and I wanted to show how FP could be successfully used with those languages, and thus my book.

Federico's book list on the theory and practice of computer programming

Federico Kereki Why did Federico love this book?

This book is different from the others I recommended, because its focus is not really on creating algorithms, but rather on how to improve code with a systematic process, keeping functionality but enhancing quality.

The author shows several practical techniques that he applies to real-world problems and empower you to elevate your code's quality and adapt it seamlessly to changing needs. It's not just about writing code; it's about becoming a more effective and confident developer.

I consider this book a companion on the journey to mastering the craft of coding. With it, you’ll always be able to achieve higher-quality code, no matter the original version of the code.

By Martin Fowler,

Why should I read it?

2 authors picked Refactoring as one of their favorite books, and they share why you should read it.

What is this book about?

Refactoring is about improving the design of existing code. It is the process of changing a software system in such a way that it does not alter the external behavior of the code, yet improves its internal structure. With refactoring you can even take a bad design and rework it into a good one. This book offers a thorough discussion of the principles of refactoring, including where to spot opportunities for refactoring, and how to set up the required tests. There is also a catalog of more than 40 proven refactorings with details as to when and why to use…


Book cover of Domain-Driven Design: Tackling Complexity in the Heart of Software

Alexander Granin Author Of Functional Design and Architecture

From my list on domain modeling.

Why am I passionate about this?

If someone had told me during my early professional years that I would become a strong advocate for functional programming and the author of a fundamental book on functional software engineering, I would have found it hard to believe. Was functional programming truly worth dedicating my life to? However, once I experienced the sheer beauty of functional programming, there was no turning back. I delved deep into Haskell and functional C++, and began writing articles, giving talks, and developing various technologies. I realized that I possessed a truly unique perspective on approaching software engineering in functional languages, and that there was a significant knowledge gap that needed to be filled for the benefit of all.

Alexander's book list on domain modeling

Alexander Granin Why did Alexander love this book?

My journey in the world of software development has been arduous and challenging.

One of the common struggles we all face is the overwhelming number of solutions available, making it impossible to fully grasp everything at a deep level.

Just when I thought I had mastered an approach and felt competent in it, a new shiny approach would emerge, demanding my immediate attention. It often felt like a never-ending race to keep up with the ever-evolving field.

This constant pursuit of staying relevant as a software engineer can be frustrating, as it feels like we are always lagging behind the rapidly advancing world. I discovered that knowledge of specific technologies, frameworks, or libraries does not easily transfer across different technology stacks. They are too specific and lack universality. It was then that I turned my focus to more general principles of software engineering.

I realized that there are fundamental engineering…

By Eric Evans,

Why should I read it?

2 authors picked Domain-Driven Design as one of their favorite books, and they share why you should read it.

What is this book about?

Incorporate effective domain modeling into the software development process

Software design thought leader and founder of Domain Language, Eric Evans, provides a systematic approach to domain-driven design, presenting an extensive set of design best practices, experience-based techniques, and fundamental principles that facilitate the development of software projects facing complex domains. Intertwining system design and development practice, this book incorporates numerous examples based on actual projects to illustrate the application of domain-driven design to real-world software modeling and development.

Domain Model: Part I outlines the goals of domain-driven development, defines terms, and gives an overview of the implications of using the…


Book cover of Dream Again

Danyelle Scroggins Author Of Blame It On My Boots

From my list on for spiritual growth, healing, and hope.

Why am I passionate about this?

In every book that I have recommended, you’ll find the dynamics of family and love. I’ve been a pastor for over fifteen years and now work as an author of both Christian fiction and non-fiction books. I'm a Chaplain for a Trauma One leveled hospital, and I counsel people of all ages. My master's degree in Religious Education is also a much-used tool as I’ve used education to deepen my quest to obtain knowledge. My love of books about family and love began when I lived in Yokosuka, Japan. I was far away from my family, beginning a new chapter with my own family, but right on the verge of learning how friends can truly turn into family.

Danyelle's book list on for spiritual growth, healing, and hope

Danyelle Scroggins Why did Danyelle love this book?

There’s is nothing more calming than a book that brings hope. In this awesome book by Author Ann Marie, you’ll find such a mixture of life, struggles, and love. This book is definitely one of those second-chance books that will cause a reader to understand that your past was never meant to define your future. If you have never read a book by this author, you should definitely try one.

By Ann Marie Bryan,

Why should I read it?

1 author picked Dream Again as one of their favorite books, and they share why you should read it.

What is this book about?

One random day. One burst of laughter. One perfect moment. That’s all it takes for Gianna Barrett to capture Carter McIntosh’s attention—and his heart. His whole life has been a series of miracles, so this falls right in line. If only it were that simple. The object of his desire refuses to give him the time of day. Not deterred, Carter is sure he’s ready to put his heart on the line for love. Big mistake. He isn’t quite prepared and finds himself wrestling a soul-deep hurt into submission.“There has been an accident....” That devastating revelation shattered Gianna’s life, and…


5 book lists we think you will like!

Interested in object-oriented programming, computer programming, and software?

Software 61 books