Zodiac The Shocking True Story of the Hunt for the Nation's Most Elusive Serial Killer

Orc Grove (a book that is gory, gruesome, or gritty) read for the Quest for the Bookie Grail in The Book Junkie Trials 2019. Magi for the win!

This totally fit the prompt, but I don't think I'll ever be on board with a true crime book that actually considers the idea that a serial killer was influenced to kill by the moon.