Professor Coffin was one of the last titles to be printed by Charlton Comics. It was basically another horror anthology title, but with
all-new stories. The book sported a framing device in the form of the title character's misadventures with his niece Arachne, specifically
their encounters with the supernatural. Prof. Cyrus COffin was a character who first appeared in Charlton's Midnight Tales title.
Prof. Coffin lasted only three issues; this was part of a 'last gasp' before the Charlton company went out of business completely.
Consequently, this is one of the smaller-print-run titles that are difficult and expensive to locate now. (Not that you'd want to.)