Goosebumps, Monsters at Midnight.
By R.L. Stine.
A tale of two young girls who end up stuck in Horrorland. They meet many monsters, one named Irk, and the monsters leader, Slappy. The girls are living in a land of Nightmares. Will they ever get back home safe & sound? Or will they be trapped in Horrorland for all time??
(Published October 25, 2017).