Really fascinating, and the chronological presentation made it easy to follow. Based on other reviews, my own previous knowledge, the book itself, and random Wikipedia checks on particularly fascinating cases, though, it seems like some facts were misconstrued or that there were some errors. Most were small, but it calls the rest of the research into question. Overall, though, I thoroughly enjoyed it, and it's a great intro to all the biggest or most representative cases of homicide in the twentieth century.