What reading level is Slime Lake?

Slime Lake by Tom B. Stone is at a Level 3-4 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is Slime Lake appropriate for?

Slime Lake is recommended for Ages 9-12. HootRating: 8ME (Moderate — Emotional). Content flags: Mild Peril, Fear & Anxiety.

What genre is Slime Lake?

Slime Lake is fiction — Juvenile Fiction. Part of the Graveyard School series.

Does Slime Lake have any content warnings?

Slime Lake has a HootRating of 8ME (Moderate — Emotional). Content flags include: Mild Peril, Fear & Anxiety. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is Slime Lake?

Slime Lake by Tom B. Stone is 103 pages (approximately 17,614 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

Slime Lake

Tom B. Stone

Slime Lake

Age Rating, Reading Level & Content Guide

by Tom B. Stone

Graveyard School

Reading Level 3-4 8ME Ages 9-12 Heads Up

The text is written at a 3rd 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.

Buy on Amazon Listen on Audible

We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.

About This Book

Marc and his twin sister Terri are thrilled to spend summer at their uncle's lake house, but things take a spooky turn when a strange green slime appears all over the lake. As the peaceful waters become crowded and mysterious, Marc faces a chilling mystery when Terri disappears beneath the surface. Danger and secrets hide beneath the slime-covered waves, waiting to be uncovered.

Themes

TwinsFamilyHorror StoriesAdventureNature

Quick Assessment

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

Why we rated Slime Lake 8ME

Slime Lake is written at a Level 3-4 reading level across 103 pages (approximately 17,614 words). Strong independent readers around grade 4.8 can typically handle this book on their own; with parent or teacher support, Slime Lake works for readers up to grade 5.8.

Read aloud, Slime Lake runs about 2 hours — long enough to span several bedtime sessions.

We rate Slime Lake as 8ME ("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.

Specific content flags noted by reviewers: Mild Peril, Fear & Anxiety.

Thematically, Slime Lake explores twins, family, horror stories, adventure, and nature — 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 twins, family, horror stories.
✓ Readers who fall hard for one book and want a long series to live in — there are 26 more books in the Graveyard School series.