This is a summary of what I thought were the best parts of the book, "Conspiracy Theories and the People Who Believe Them," plus a few extra comments from me. The book is a collection of chapters written by 31 different authors, all of whom are experts on conspiracy theories, but in different fields, including political scientists, psychologists, sociologists, and historians. Although most of the chapters are written like scientific papers (academic language and lots of citations), the book is fascinating.