This is for a lot of two nonfiction books titled The World's Most Evil Psychopaths: Horrifying True-Life Cases by John Marlowe and Female Serial Killers: How And Why Women Become Monsters by Peter Vronsky." The Psychopaths book is published by Chartwell Books Inc. and the Female Serial Killers book by Berkley Books, both in 2007, are intended for adults and explore the topics of mental illness and crime. The author provides insight into the dark and dangerous minds of some of the most infamous serial killers in history, offering a detailed narrative of their terrifying crimes and sinister personalities. This gripping read is sure to captivate readers with its chilling tales and in-depth investigations into the minds of these notorious killers. The Psychopaths is a hardback book and the Female Serial Killers book is a trade paperback. books have some light edge and corner wear. The Female Serial Killers book has a crease on the front and back covers near the spine that goes down the full length of the spine. Any questions please ask.