Matt's friends plan a fun sleepover to try and cheer him up after he falls into a deep grief over the death of his nanny, but the sleepover quickly takes a turn when they realize the family's new nanny may be an actual monster.

"As a prize for reading the most books, Stella's class wins a sleepover in the school library. But after some strange occurrences, including finding a book written by an author who has the same name, Stella realizes she's not as brave as she thought"--Provided by the publisher.

Norm worries that he will not be able to go to sleep when his class wins a sleepover in the Monster School library.

When Stink's parents win an aquarium sleepover, he and his two friends enjoy a scavenger hunt before trying to fall asleep while worrying about the frankensquid on the loose.

Although she has battled supervillains, Ellie has recently become scared of the dark, so when she is invited to a Halloween sleepover at her best friend's house she is apprehensive--but when the villainous Fairy Frightmare sprinkles the girls with bad dream dust, trapping them all inside their nightmares, Ellie must squash her own fears to rescue her friends.