Reviewed by HootRated editorial · Last updated
Underground
Jean Ferris
Underground
Age Rating, Reading Level & Content Guide
by Jean Ferris
The text is written at a 4th grade reading level, the subject matter is intended for teens (ages 13+), and the content has moderate intensity with some emotionally heavy themes.
We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.
About This Book
The cool, damp air of Mammoth Cave wraps around you like a secret as footsteps echo softly in the dark. Charlotte feels the rough stone walls pressing close, a reminder of the world above that holds her captive. But beneath the earth, a different kind of freedom flickers—one that might change everything.
Themes
Quick Assessment
Set in 1839 Kentucky, this historical fiction novel follows Charlotte, a sixteen-year-old enslaved maid, and Stephen, a skilled cave guide and fellow slave, as they navigate the dangers and hopes of their lives around Mammoth Cave. The story explores themes of freedom, courage, and moral choices, suitable for teens aged 13 and up. Parents should be aware of the book’s depiction of slavery and the emotional challenges faced by the characters.
Why we rated Underground 9ME
Underground is written at a Level 4-5 reading level with a Lexile measure of 770L across 176 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, Underground works for readers up to grade 6.5.
We rate Underground as 9ME ("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, social complexity — 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, Underground explores historical, african-american, family, coming of age, and nature & the natural world — these threads give the book room to mean different things to different readers. Each of these themes is concrete enough to seed a real conversation, not just a moral lesson.
Good fit for
- ✓ Children in the Ages 13+ range — the maturity and attention span match the story's pacing.
- ✓ Patient readers who enjoy slower, character-driven stories.
- ✓ Readers ready to talk through themes after they finish — there's enough substance for a meaningful conversation.
- ✓ Kids drawn to stories about historical, african-american, family.
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.
For Parents
Content Intensity
9ME — Moderate — EmotionalReal stakes and emotional weight. May include sustained danger, loss, or bullying.
Was our "Moderate" content intensity rating accurate for this book?
Reading Insights
Hook Factor
1/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
5/10Good conversation starter with themes worth exploring together.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
Underground
Denise Fleming
Underground
Denise Fleming
River runs deep
Jennifer Bradbury
River runs deep
Jennifer Bradbury
Underground to Canada
Barbara Smucker
Underground to Canada
Barbara Smucker
The underground railroad
Sally Marcey
The underground railroad
Sally Marcey
The Underground Railroad
Dennis B. Fradin
The Underground Railroad
Dennis B. Fradin
Underground Railroad
Elaine Landau
Underground Railroad
Elaine Landau
Details
Book Length
- ISBN
- 9780374372439
- Pages
- 176
- Publisher
- Farrar, Straus and Giroux (BYR)
- Published
- October 16, 2007
- Type
- Fiction
- Lexile
- 770L