From my list on learning how to think logically and critically.
Who am I?
Of all my university courses, the one that had the greatest impact on me was called "Informal Logic." Accurate, but misleadingly dry and academic. One of the assignments in that course—and the one I remember most, of all my university assignments—was to prepare a "Crapbook": a collection of ten bits of crap—ads, arguments, whatever—that were full of crap (essentially, incorrect reasoning/logical fallacies). I loved it. So when, twenty years later, I was hired by a small university to teach Critical Thinking …
Peg's book list on learning how to think logically and critically
Why did Peg love this book?
There are many critical thinking/informal logic books that focus exclusively (or mainly) on fallacies, and although that's not all there is to critical thinking, and although it encourages an adversarial approach ("Let me tell you what mistakes you're making"), it is good to have at least one such book on hand. I like Engel's book because of its classification system (fallacies of ambiguity, fallacies of presumption, fallacies of relevance), because of its clarity, and because of its many illustrations and exercises.