One of my favorite books ever. If you are interested in human behavior, and why we sometimes behave irrationally even when we think we're making informed decisions, this book will enlighten you. And I use that word intentionally, because it really did change my perspective on risk. Usually a month doesn't go by that I don't mention or use something that I learned from that book, like the gambler's fallacy or the Texas sharpshooter's fallacy.