FANTASTIC FOUR (1961) #220

The FF must travel to the North Pole to uncover the source of a worldwide blackout. Who, or what, is behind this villainy? Notes Features the Hostess Twinkies Cakes ad, Spider-Man In « The Trap » Bob Budiansky’s assistant editor credit taken from letters page header. Features a pin-up page pencilled and inked by Joe Sinnott, based on Fantastic Four #214 . (Unused cover, perhaps?)