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Abby and Gretchen have been best friends since fifth grade, when they bonded over a shared love of ET, roller-skating parties, and scratch-and-sniff stickers. But when they arrive at high school, things change. Gretchen begins to act . . . different. And as the strange coincidences and bizarre behavior start to pile up, Abby realizes there's only one possible explanation: Gretchen, her favorite person in the world, has a demon living inside her. But Abby is not about to let anyone or anything come between her and her best friend. With help from some unlikely allies, she embarks on a quest to save Gretchen. But is their friendship powerful enough to beat the devil?

About the Author

Grady Hendrix

Grady Hendrix is the author of "Horrorstor" the only novel about a haunted Scandinavian furniture superstore you'll ever need. It has been translated into 14 languages and is being made into a TV show by Gail Berman ("Buffy the Vampire Slayer") , Charlie Kaufman ("Eternal Sunshine of the Spotless Mind") , and Josh Schwartz ("Gossip Girl") . His next novel is "My Best Friend's Exorcism," about demonic possession, friendship, exorcism, and the Eighties. It's out from Quirk Books in May, 2016.

His stories about UFO cults, killer Chinese parasites, Cthulhu dating your mom, and super-genius human-hating apes have appeared in Lightspeed Magazine, Strange Horizons, Pseudopod, and "The Mad Scientist's Guide to World Domination."

He's co-author (along with his wife) of the award-winning "Dirt Candy: A Cookbook," the world's first graphic novel cookbook.

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