This document discusses paradigm-changing books that have affected the way the author thinks or acts. It provides summaries of 14 books, including True Believer by Eric Hoffer which presents a theory for why people join religious groups or cults, drawing from real-world examples. It also summarizes 7 Habits of Highly Effective People by Stephen Covey which contains seven habits to improve goal-setting and interactions with others. A third book summarized is How to Win Friends & Influence People by Dale Carnegie which contains simple yet difficult to apply tips for interacting with others.