Meeting And Greeting The Gruesomes

On November 12, 1964, the Gruesomes, those spooky stone-age monsters-next-door made their debut on Hanna-Barbera's The Flintstones. For our Countdown to Halloween 2017, here's the cover of a rad coloring book celebrating the creepy Addams Family-like clan that moved into Bedrock, giving Fred Flintstone (and monster kids everywhere) thrills and chills.