HIDDEN GEMS: Dracula by Bram Stoker

This 1897 gothic horror novel is an immortal classic. 

HIDDEN GEMS: Killer Clown by Terry Sullivan 

If you read one book about Gacy, it should be this one. 

HIDDEN GEMS: The Best New True Crime Stories by Mitzi Szereto

There are way more serial killers out there than you'd think.

HIDDEN GEMS: To Hatred Turned by Ken Englade

A cold case murder brought back to life when terrible truths are revealed.