Discover the shocking true stories of the world's most barbaric criminals from Charles Manson and Jeffrey Dahmer to The Night Stalker and more. Serial Killers & Mass Murderers takes you into the minds of the criminals who committed the world's most notorious and horrifying crimes. Each of the sadistic murderers profiled here was once known simply as someone's neighbor, co-worker or child. What turned them into killers? In one chilling chapter after another, this book profiles a terrifying succession of homicidal maniacs and asks the question, "What makes them tick?"