What reading level is Mortal Engines?

Mortal Engines by Philip Reeve is at a Level 7 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is Mortal Engines appropriate for?

Mortal Engines is recommended for Ages 9-12. HootRating: 12ME (Moderate — Emotional).

What genre is Mortal Engines?

Mortal Engines is fiction — Young adult fiction.

Does Mortal Engines have any content warnings?

Mortal Engines has a HootRating of 12ME (Moderate — Emotional). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is Mortal Engines?

Mortal Engines by Philip Reeve is 320 pages.

Reviewed by HootRated editorial · Last updated June 9, 2026

Mortal Engines

Philip Reeve

Mortal Engines

Age Rating, Reading Level & Content Guide

Movie Tie In

by Philip Reeve

Reading Level 7 12ME Ages 9-12 Balanced Read

The text is written at a 7th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content has moderate intensity with some emotionally heavy themes.

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About This Book

Here’s a secret: giant cities don’t just stay put—they roam the wastelands, hunting smaller towns to survive. When Tom is thrown off one of these moving monsters with a fierce scar-faced girl, their wild escape uncovers a deadly weapon that could change everything. But that’s only the beginning.

Themes

Adventure Fantasy World-Building Friendship Survival

Quick Assessment

Mortal Engines is a middle-grade fantasy adventure featuring mobile cities in a post-apocalyptic world. It contains themes of survival, friendship, and danger as young protagonists face peril and uncover powerful threats. Suitable for ages 9-12, the book includes scenes of mild violence and suspense but is appropriate for middle-grade readers interested in fantasy and action.

Why we rated Mortal Engines 12ME

Mortal Engines is written at a Level 7 reading level across 320 pages. Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Mortal Engines works for readers up to grade 9.0.

We rate Mortal Engines as 12ME ("Moderate — Emotional") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from emotional weight, physical peril — these are the dimensions parents should evaluate against their reader's tolerance.

No specific content flags were raised by community reviewers, which is consistent with the moderate intensity score.

Thematically, Mortal Engines explores adventure, fantasy world-building, friendship, and survival — 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.
✓ Patient readers who enjoy slower, character-driven stories.
✓ Kids drawn to stories about adventure, fantasy world-building, friendship.

Maybe not for

! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
! Reluctant readers who need a fast hook — the pacing here rewards patience.