Samantha Shannon

This 21-year-old writer's name was once whispered, now shouted, as YA heir apparent to J.K. Rowling. To be fair, her debut novel, The Bone Season (one in a projected series of seven), feels more like it's in the realm of Suzanne Collins: It's about sparring psychics on a dystopian earth who deal with issues darker than the flavor of Bertie Bott's beans.