Fun & interesting trivia questions broken down into categories such as A Poirot Perspective, Mon Ami Hastings, Fifty Ways to Kill Your Victims, Secondary Sleuths, etc. Each section lists the numbered questions & is followed by the corresponding answers. You would have to know all the Christie works in extreme detail & have a fantastic memory to get even a quarter of them correct. Having just re-read them all, I got several I probably wouldn't have remembered normally. Some are quite obscure & others are pretty obvious, but it's always fun to test your knowledge. There were only two errors that I found (& double-checked them in my Christie Companion to be sure) which slipped past the editor, but, otherwise, a fun book.