Hot Stuff, the Little Devil #128

Harvey's pint-sized red devil is front and center on this 1975 cover, trident in hand and looking pleasantly surprised as a magical doorway swings open behind him — revealing a charging armored knight on horseback and a spooky ghost rushing straight toward him. The cover tagline says it all: "Watch out, Hot Stuff! You've opened the door to the… Cold, Cold, Cold Castle!!" It's a charming setup that perfectly captures the cheerful mischief and mild spookiness that made Hot Stuff, the Little Devil such a delight for young readers.