Nelly the Monster Sitter Books in Order

Returning to babysit the Cowcumbers, Nelly discovers that Petal has a loose tooth. What might be an ordinary childhood milestone becomes a dangerous challenge when a troublesome tooth furry threatens to visit the monster household.

Nelly takes on the job of caring for baby monster Glug, whose extra eyes, tongues, and legs make ordinary routines complicated. Getting her unusual charge clean becomes a particular challenge when bath time requires far more coordination than expected.

Nelly expects a straightforward evening watching a monster egg, reassured that Pipplewak eggs never hatch early. Her babysitting skills face an unexpected test when that comforting assumption begins to look less reliable than the parents suggested.

Nelly babysits Slop, a young Squurm with multiple eyes, two brains, and a mass of feelers. His love of practical jokes, dislike of losing, and short attention span turn keeping him entertained into a demanding assignment.

An underwater penthouse sounds like an exciting place for Nelly's next monster-sitting job. The mischievous Water Greeps soon make it clear that looking after them will involve more than admiring their unusual home, and probably getting wet.

Nelly arrives to look after the children of an exceptionally tall reptilian monster family. The job becomes puzzling when the Altigator parents cannot stay away from their apartment for more than a few minutes, leaving her to discover what worries them.

Nelly spends Christmas with the Dendrilegs, a monster family whose purple tentacles promise an unusual celebration. Her holiday babysitting assignment takes a surprising turn when the visitor expected down the chimney is not Father Christmas.

Nelly encounters the smallest monsters she has ever cared for, but their tiny size does not make the job simple. With 123 Digdiggs to watch, keeping track of every charge becomes an enormous challenge for the experienced monster sitter.

Nelly invites the Huffaluks to celebrate her twelfth birthday with a barbecue. Having monsters as party guests should be exciting, but her sister Asti is unhappy about the arrangements and determined to cause trouble.

Monster-sitter Nelly discovers that getting the giant spider Muggots to sleep requires frightening them. When familiar scares stop working, she must invent a new way to spook her unusual charges without becoming terrified herself.

The Polabores want to do absolutely nothing, leaving Nelly expecting a dull evening of monster-sitting. Inviting her sister Asti to enliven the visit soon gives her reason to wish things had stayed quiet.

A monster-sitting job with the Rimes leaves Nelly unexpectedly lost for words. When baby Shimma needs saving, she must overcome that difficulty quickly and find a way to help her unusual charge.

Nelly takes a monster-sitting job during a heat wave, only to discover that Thermitts must remain at freezing temperatures or melt. Keeping the little monsters safe becomes an urgent and unusually chilly childcare challenge.

Nelly arrives at the Ultravores’ home for another monster-sitting assignment and learns that flies are on the dinner menu. As the evening gets increasingly sticky, she begins to suspect that she might be considered food as well.

Nelly expects another evening caring for unusual monster babies when she visits the Wattwatts. Instead, the arrangement turns upside down: the monsters must look after her, creating a shocking new challenge for the experienced sitter.

Nelly babysits monsters whose parents struggle to find anyone willing to watch them. Playing hide-and-seek with an oozy Squurm and ice-skating with a baby Thermitt turn ordinary childcare into a series of unpredictable adventures.