I am eagerly awaiting in the mail the arrival of two 1950s-era paperbacks that I ordered through biblio.com. MARK OF THE MOON and THE WITCHING NIGHT. I'm including images of the covers of both books. These two novels were in my dad's paperback library, and I "appropriated" them when I was 12 or 13. I no longer remember anything about them -- except that one of them (THE WITCHING NIGHT, I think) features a knock-knock joke, told (I think) by the hero's secretary to the hero:
"Formaldehyde-ing places came de Indians, whoo-whoo-whoo."
I only hope the rest of the books are that good! (But -- if that's all I remember about either -- what does it say about the books themselves?)