The ultimate never-ending list. I will only add the first of any series. Additionally, I'll add those books that others have chosen for the Mystery category of Halloween Bingo.
My personal tastes are decidedly traditional/cozy, so please leave your book recommendations below in the comments and I'll add them asap.
For 2017 Bingo, any of these books would work for Murder Most Foul, while some may work for the other mystery squares; if I know a specific title will fit other squares, I've noted it in the notes section for that book.
Note: Cozy, Paranormal, Witches