Fantastic Four #66

From 1967, this Marvel milestone bears the bold promise of "The Mystery of the Year!" as Jack Kirby and Joe Sinnott's cover plunges the Thing and a startled blonde woman into a scene of swirling dark smoke and ominous, glowing chaos. The title question — "What Lurks Behind the Beehive?" — hangs over the action with genuine intrigue, with the rocky, powerful Thing raising a defensive fist while his companion recoils in alarm. Stan Lee and Kirby were firing on all cylinders during this era, and this issue's atmospheric cover makes it easy to see why Fantastic Four earned its masthead billing as "The World's Greatest Comic Magazine!