Judging comics by their covers.
You can find other entries in the Genius Covers series HERE.
When I make it to a comic shop I haven't been to before, my first stop is typically the horror comics section. There are so many great unknown/short-lived horror series that have such great covers that I'll pick up some of them before going with issues of th more well-known series.
Monsters on the Prowl started off as Chamber of Darkness before switching names after issue No. 8. The series also switched from new content to reprinting older stories from the Atlas Comics days before they became Marvel Comics in 1961. Issue No. 27 (from Nov. 1973) features a story written by Stan Lee and illustrated by Jack Kirby that is originally from 1963. The monster that is prowling is Sserpo who is a brick-like monster sort of like the Fantastic Four's The Thing if he was the size of a skyscraper.