Seraphina Ramon will stop at nothing to find out the truth about why her sister Eff is in a coma after a very suspicious “accident.” Even if it means infiltrating the last place Seraphina knows Eff was alive: a once-abandoned amusement park now populated by a community of cultists.

Follow Seraphina through the mouth of the Goblin: To the right, a wolf-themed roller coaster rests on the blackened earth, curled up like a dead snake. To the left, an animatronic Humpty Dumpty falls...