What reading level is Sleepless?

Sleepless by Gordon Korman is at a Level 6 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is Sleepless appropriate for?

Sleepless is recommended for Ages 9-12. HootRating: 11C (Clear).

What genre is Sleepless?

Sleepless is fiction — Juvenile Fiction.

Does Sleepless have any content warnings?

Sleepless has a HootRating of 11C (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 Sleepless?

Sleepless by Gordon Korman is 208 pages.

Reviewed by HootRated editorial · Last updated August 1, 2026

Sleepless

Gordon Korman

Sleepless

Age Rating, Reading Level & Content Guide

by Gordon Korman

Reading Level 6 11C Ages 9-12 Balanced Read

The text is written at a 6th 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

What if you suddenly stopped needing sleep but had to keep it a secret? Five kids find themselves wide awake every night with extra hours to spare, but they don't know why. When they discover each other, they realize this strange sleeplessness is just the beginning of a bigger mystery.

Themes

Mystery FriendshipGrowing UpFamily Life

Quick Assessment

Sleepless follows five middle-grade kids who mysteriously stop needing sleep and must keep this secret from their families and friends. As they navigate their new reality, they bond and work together to uncover the cause of their sleeplessness. Suitable for ages 9-12, the story explores themes of friendship, mystery, and growing up with light suspense but no intense content.

Why we rated Sleepless 11C

Sleepless is written at a Level 6 reading level across 208 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, Sleepless works for readers up to grade 8.0.

We rate Sleepless as 11C ("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, Sleepless explores mystery, friendship, growing up, and family life — 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 mystery, friendship, growing up.

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.
! Reluctant readers who need a fast hook — the pacing here rewards patience.