Kurt Vonnegut’s Slaughterhouse-Five, or The Children’s Crusade: A Duty-Dance with Death, turns 50 this week. Originally published on March 31, 1969, the novel—a genre-bending WWII story about a soldier who becomes “unstuck in time”—was Vonnegut’s first to become a bestseller, and 50 years later, it’s still his most beloved and influential. Many a teenage mind has been blown by Slaughterhouse-Five, and many an adult mind, too. To celebrate the birthday of this essential American novel, I looked at how it’s been covered over the years—both at home and abroad. Some of the below covers are beautiful, some impactful, and some simply odd, but they all make me want to read the book again.