I loved this graphic novel!! There's the human world and monsters live in the shadow world. Each human has a monster who is tied to their life. On Halloween, the guardian of the worlds was incapacitated and the veil between the worlds disappeared, letting the monsters in. 10 year old Mona meets a group of new "friends" that include a vampire boy, a ghoul, a were opposum, a voodoo doll, a ghost doctor, and her own personal monster.