What reading level is The Last Kids on Earth and the Cosmic Beyond?

The Last Kids on Earth and the Cosmic Beyond by Max Brallier, Douglas Holgate is at a Level 5 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is The Last Kids on Earth and the Cosmic Beyond appropriate for?

The Last Kids on Earth and the Cosmic Beyond is recommended for Ages 9-12. HootRating: 10LP (Light — Physical). Content flags: Mild Peril, Fantasy Violence.

What genre is The Last Kids on Earth and the Cosmic Beyond?

The Last Kids on Earth and the Cosmic Beyond is fiction — Juvenile Fiction. Part of the The Last Kids on Earth series.

Does The Last Kids on Earth and the Cosmic Beyond have any content warnings?

The Last Kids on Earth and the Cosmic Beyond has a HootRating of 10LP (Light — Physical). Content flags include: Mild Peril, Fantasy Violence. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is The Last Kids on Earth and the Cosmic Beyond?

The Last Kids on Earth and the Cosmic Beyond by Max Brallier, Douglas Holgate is 289 pages.

Reviewed by HootRated editorial · Last updated May 18, 2026

The Last Kids on Earth and the Cosmic Beyond

Max Brallier, Douglas Holgate

The Last Kids on Earth and the Cosmic Beyond

Age Rating, Reading Level & Content Guide

by Max Brallier, Douglas Holgate

The Last Kids on Earth · Book 4

Reading Level 5 10LP Ages 9-12 Balanced Read

The text is written at a 5th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material.

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About This Book

Jack and his friends face their first winter after the monster apocalypse with snowy adventures and epic battles, but their fun is threatened when a dangerous human villainess steals Jack’s most powerful weapon. Racing against time, they uncover a sinister scheme that could endanger the whole world and beyond. Packed with thrilling action and lively illustrations, this adventure is perfect for kids who love comic-style stories and heroic quests.

Themes

Friendship Adventure Fantasy World-Building Humor

Quick Assessment

This is a Level 5 book with mild content intensity. Content themes include mild peril, fantasy violence. Written for readers ages 9-12.

Why we rated The Last Kids on Earth and the Cosmic Beyond 10LP

The Last Kids on Earth and the Cosmic Beyond is written at a Level 5 reading level across 289 pages. Strong independent readers around grade 6.0 can typically handle this book on their own; with parent or teacher support, The Last Kids on Earth and the Cosmic Beyond works for readers up to grade 7.0.

We rate The Last Kids on Earth and the Cosmic Beyond as 10LP ("Light — Physical") because the content sits in the "Mild" range — mild conflict — the kind a child encounters in normal play and sibling life. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly mild; no single dimension stands out as a concern.

Specific content flags noted by reviewers: Mild Peril, Fantasy Violence.

Thematically, The Last Kids on Earth and the Cosmic Beyond explores friendship, adventure, fantasy world-building, and humor — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
✓ Readers who like a steady plot with enough momentum to keep pages turning.
✓ Kids drawn to stories about friendship, adventure, fantasy world-building.
✓ Readers who fall hard for one book and want a long series to live in — there are 7 more books in the The Last Kids on Earth series.