The Occult Coloring Book
Troubador Press (1971)
This falls under the category of things that would have made my grandmother lose her mind if she ever found it in the house. I never had this or even knew it existed, but it was recently written about in We Are The Mutants
and now I want to find it. Who wouldn't want to kick back with a box of Crayola and spend some time being buds with Beelzebub?