Sadia: The Eighth Circle of Heck by Dale E. Basye

After Marlo loses the War of the Words against her brother, she is whisked away to the deepest bowels of the underworld. Guilt-ridden, Milton agrees to work for Principal Bubb in hopes that he can locate his sister and somehow free her. But his nefarious mission—to “character assassinate” the reigning vice principal of Sadia: Where the Really Mean Kids Go—runs afoul when he learns the true identity of this mysterious individual. Meanwhile, Marlo wakes up to teenage paradise: a veritable You-Topia where everything seems to revolve around her. Marlo soon dis- covers, however, that she is being built up only to be torn down in the cruelest way possible by the Mother Superiority—ruler of the Shunnery—and her cold-shouldering, shade-casting denizens. There’s also a mutiny brewing in Heaven while the underworld is turned into a tourist destination for the living. Can Milton follow through with his mission: navigating a nest of history’s cruelest tyrants in the process? Can Marlo hold on to her identity amidst a nuclear self-esteem assault? Will they discover the secret history of Sadia before it is used as a weapon against none other than the Big Guy Upstairs?