For anyone interested in serial killers, mass murderers, etc. this book definitely gives insight to a broad range of them. I personally think it's important to know the true names of the killers, as many were just looking to get famous and were quickly nicknamed by the media. This concise yet detailed book provides their real names, backgrounds/history of the individual, his/her family life, the crimes, and for the most part, the victims' names are listed as well.