Don't Go to Sleep!
Appearance
In R.L. Stine's 54th Goosebumps novel, Don't Go to Sleep!, a boy goes to sleep in the family guest room, only to wake up as a different person each day, which catches the attention of two black-clad thugs and a seemingly innocent girl who are a part of a group known as The Dream Police, a group that catches criminals who break the lines between dreams and reality.