What reading level is Energy?

Energy by Peter D. Riley is at a Level 7 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is Energy appropriate for?

Energy is recommended for Ages 9-12. HootRating: 12C (Clear).

What genre is Energy?

Energy is nonfiction — Force and energy. Part of the Cycles in Science series.

Does Energy have any content warnings?

Energy has a HootRating of 12C (Clear). 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 Energy?

Energy by Peter D. Riley is 32 pages (approximately 4,363 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

Energy

Peter D. Riley

Energy

Age Rating, Reading Level & Content Guide

by Peter D. Riley

Cycles in Science

Reading Level 7 12C Ages 9-12 Sweet Spot Page-Turner

The text is written at a 7th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is gentle with no concerning themes.

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About This Book

Discover the fascinating world of energy and how it powers everything around us. Explore different types of energy like solar, nuclear, and electrical, learn how energy changes forms, and find out why saving energy is important for our planet's future. Perfect for curious minds eager to understand the forces that keep our world moving.

Themes

Science & NaturePower resourcesForce and energy

Quick Assessment

This is a Level 7 book with gentle content intensity. It's a Sweet Spot read — challenging text with gentle themes, ideal for advanced or 2e readers. No notable content concerns flagged. Written for readers ages 9-12.

Why we rated Energy 12C

Energy is written at a Level 7 reading level across 32 pages (approximately 4,363 words). Strong independent readers around grade 8.0 can typically handle this book on their own; with parent or teacher support, Energy works for readers up to grade 9.0.

Read aloud, Energy takes about 29 minutes, which fits within a single read-aloud session.

We rate Energy as 12C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.

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

Thematically, Energy explores science & nature, power resources, and force and energy — 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 science & nature, power resources, force and energy.
✓ Readers who fall hard for one book and want a long series to live in — there are 3 more books in the Cycles in Science series.
✓ Curious kids who prefer real-world topics over made-up stories.

Maybe not for

! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.