Richie Rich & Casper #23

Harvey's beloved duo team up again in this 1978 entry, with the cover promising double the fun as Richie Rich and Casper find themselves swirling through a vivid time-travel vortex surrounded by flying dollar bills. Visible across the whirlwind scene are a medieval knight on horseback, Egyptian pyramids, a sailing galleon, and a menacing giant with a whip — all hinting at the wild, era-hopping adventure the two friends are undertaking in search of "The Strangest Birthday Gift." It's a cheerful, imaginative cover that captures exactly why this pairing of the Poor Little Rich Boy and the Friendly Ghost worked so well together.