[Supernatural Born Killers] I saw this title, and then the rest of the series, and knew that they deserved a mention here. In addition to Supernatural Born Killers, which is the most recent entry, the Pepper Martin mysteries include:

Don of the Dead
The Chick and the Dead
Tombs of Endearment
Night of the Loving Dead
Dead Man Talking
Tomb With a View
A Hard Day’s Fright
Wild Wild Death (weakest entry) 

This is series punning done RIGHT. They (presuming author + publisher) picked a theme: movies. They applied death-related terms to all their chosen titles, without too much reaching. They’ve left themselves lots of room for future titles. *polite clapping*