Fans pick 57 books like The Mercenary

This book by Robert Heinlein is an action-packed space adventure featuring creepy insect foes in an interstellar battle with Earth. It follows Trooper Johnny Rico in an epic war story set on distant worlds.

The book features a number of combat engagements with gigantic insect-like “Arachnids” and other bug-like creatures. Meanwhile, several love affairs arise and crumble in the face of Rico’s commitment to the warrior life. While the book has been criticized as preachy and moralizing, these are foibles that I tolerated well, knowing that another action sequence would not be long in coming.

Drake served in an armor unit in Southeast Asia in the 1970s, so it’s no coincidence that Hammer’s Slammers, a collection of short stories, revolves around a tank unit. So many military SFF stories focus on knuckle-dragging ground-pounders, so it’s refreshing to see war from a tank turret. Drake has been accused of writing gun porn, but I find a lot of nuance in his writing, especially on combat motivation and small-unit leadership. He was one of the first military SFF authors to write an openly gay character, and women fight right alongside men without the misogynistic or objectifying undertones that sometimes afflict the subgenre. To get a sense for Drake’s writing, “But Loyal to His Own” and “Caught in the Crossfire” are two of my favorite stories.

Dauntless is the first in the six-book Lost Fleet series, and sets off on an epic SF journey like no other. Jack Campbell’s approach to space battles feels realistic; while the tensions and terrors of the characters are sharply realised. The opening chapters take an entire fleet of ships deep into enemy territory – and maroon them there, under the sudden and unexpected command of Captain “Black Jack” Geary. A space legend, due to his presumed death, his rescue from hibernation means he is by far the most senior officer on any of the ships – a cause for resentment and conflict on his own ship and around the fleet. And as if that’s not enough for him to deal with, his ships face annihilation from the duplicitous Syndics who lured them into a deadly trap. How will they find their way home?

Bill, the Galactic Hero is a satirical novel by Harry Harrison published while I was still in my teens. It’s funny, it’s satirical, and still delivers a good plot. Harrison also wrote the fabulous Stainless Steel Rat books. Taken together Harry’s novels taught me about the use of humor in military books—and literature generally. 

I first read Pohl’s Jem when I was a kid, and his fatalistic, even cynical take on first contact and interstellar colonization, along with the works of Harlan Ellison, Philip K. Dick, and Ursula LeGuin, greatly informed my developing views on politics and society. A near-future Earth divided into three major power blocs discovers a world ripe for exploitation and populated by not one, but three, sentient species, It’s not long before each bloc is currying the favor of different species in order to set each against the other, with absolutely no one thinking beyond their own immediate needs or with any concern about the consequences of their actions.

I was enthralled by this book. If memory serves me correctly, C.J. Cherrryh was awarded the title of Grand Master by an SF organization for this book and it’s obvious why.

The scope of the story universe she has created is mind-boggling. The characters are believable, and the action makes your heart beat faster. There are scenes in the book that make you want to see them in a movie. I can say that this book and her style of writing has had a bigger impact on my own writing than any other author.

If military SF is your thing, you’ll love this book.

A near-future space thriller, about a revolution by an orbital space colony against the governments of Earth that seek to keep it under their control, is a fast-moving blend of action, politics, and speculation. Read this and see the sort of vision of humanity’s future in space that captivated people’s imaginations at the dawn of the Space Shuttle era.

If the other four books I’ve recommended are founded in grim reality, this one’s that guilty pleasure that an ancient world author might not want to be caught reading. But, if war is a timeless and undeniable fact of human existence—and it seems to be right now—then Marko Kloos’s story of men and women at war in the 22nd century, with an enigmatic alien species as the enemy, is pretty much timeless, too.

Yes, there’s a high-tech kit, but it’s never the McGuffin, and the same themes as ever—duty, honor, and the planet—come to the fore. Easy to read but never lazy, I found this series as gripping as the others. If you (like me) read a lot of historical fiction but have a soft spot for sci-fi, then this is about as highly recommended as they come.

This book has two concepts that have stuck in my memory for years: the uplifted space-faring squid and the end-of-universe-scouring of astronomical bodies into perfectly smooth spheres. How many stories take the notion of the future to its logical extreme by showing the cosmos literally withering away countless eons downstream?

This book directly shows such a far-flung world, an endgame to which almost no science fiction story ventures. Mind uploading occurs in the novel in the far future of humanity, less so in much of the novel’s storyline in the near future, but I included it in this list because the book itself is fantastic and Baxter genuinely leans into a future in which mind uploading is an inevitable and expected outcome.

With the powerful use of language, this book explains how everyone in this world is born for a purpose. There are 40 chapters in the book required to be read over 40 days’ time. I like the concept of reading one chapter a day and reflecting on the knowledge before applying it. The message of the book is to keep God at the center of your life in order to fulfill your true purpose.