There's not really much new here if you are at all familiar with the most well-known serial killers of the 70s and 80s. If you aren't familiar with the likes of Bundy, Dahmer, Gacy, and BTK, then this has some good introductory material. The book is a spin-off of a podcast. I've never listened to it and honestly probably won't. The attempts to interject humor weren't funny. They just felt disrespectful to the victims.