The Cobalt Prince

Name: The Cobalt Prince
Author: Mark Siegel
ISBN: 9781101935897

Age Rating, Reading Level & Content Guide

by Mark Siegel

Illustrated by Xanthe Bouma

5 Worlds

Reading Level 3-4 LP · Mild · Physical Ages 9-12 Matched Page-Turner

The text is written at a 3rd grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material. Its HootRating code, LP, means mild content, mostly physical.

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About This Book

Jessa, Oona, and their new ally Ram Sam Sam race against time to prevent the Cobalt Prince of Toki from launching a devastating attack on Mon Domani. Their daring mission could change the fate of worlds and stop a looming interstellar war. Adventure and bravery light the way in this thrilling second installment.

Themes

Adventure Science & NatureHeroesFriendship Fantasy World-Building

Quick Assessment

This is a Level 3-4 book with mild content intensity. Content themes include mild peril, fantasy violence. Written for readers ages 9-12.

Why we rated The Cobalt Prince LP (Mild)

The Cobalt Prince is written at a Level 3-4 reading level across 244 pages (approximately 8,544 words). Reading-wise, most kids in grade 4 and up can manage The Cobalt Prince on their own; younger readers can enjoy it with a parent or teacher reading along.

Read aloud, The Cobalt Prince takes about 57 minutes, which fits within a single read-aloud session.

We rate The Cobalt Prince as LP (Mild, mostly 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 Cobalt Prince explores adventure, science & nature, heroes, friendship, and fantasy world-building — 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.
✓ Reluctant readers who need fast-paced, hook-heavy stories to stay engaged.
✓ Kids drawn to stories about adventure, science & nature, heroes.

Maybe not for

! Children who are sensitive to violence, even when handled at age-appropriate levels.

For Parents

Content Intensity

LP · Mild · Physical

Emotional

Gentle

Physical

Mild ←

Social

Gentle

Thematic

Gentle

Reading the HootRating code: the first letter is the content intensity (C = Gentle · L = Mild · M = Moderate · I = Intense · V = Very Intense); the second, when there is one, is the kind of content that drives it (E = Emotional · P = Physical · S = Social · T = Thematic). Reading level and age range are rated separately. How we rate

Light conflict or tension. Mild peril resolved quickly.