The lost cipher
Michael Oechsle
The lost cipher
Age Rating, Reading Level & Content Guide
by Michael Oechsle
The text is written at a 6th 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.
We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.
About This Book
What secrets could a 200-year-old treasure hold? Lucas, who's still hurting from losing his dad, finds himself at a camp where kids like him share stories and hope. When a mysterious coded map surfaces, will Lucas and his friends unlock its secrets before it's too late?
Themes
Quick Assessment
This middle-grade novel follows Lucas, a boy coping with the loss of his father, as he attends a camp for children who have lost a parent. Inspired by the legend of a hidden treasure encrypted in unsolved codes, Lucas and his friends embark on an adventurous and emotional journey. Suitable for ages 9-12, the book explores themes of grief, friendship, and problem-solving with some mild peril but no graphic content.
Why we rated The lost cipher 11ME
The lost cipher is written at a Level 6 reading level across 248 pages. Strong independent readers around grade 7.0 can typically handle this book on their own; with parent or teacher support, The lost cipher works for readers up to grade 8.0.
We rate The lost cipher as 11ME ("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.
No specific content flags were raised by community reviewers, which is consistent with the moderate intensity score.
Thematically, The lost cipher explores buried treasure, cryptography, juvenile fiction, grief, and friendship — 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 buried treasure, cryptography, juvenile fiction.
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
11ME — 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
2/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
The secret cipher
Whitaker Ringwald
The secret cipher
Whitaker Ringwald
Lost Page
Michael Dahl
Lost Page
Michael Dahl
The Lost Cove Of Desiter
Timothy G., M.D. Saxe
The Lost Cove Of Desiter
Timothy G., M.D. Saxe
Key to the treasure
Peggy Parish
Key to the treasure
Peggy Parish
The treasure hunt
Paul Hutchens
The treasure hunt
Paul Hutchens
All kinds of codes
Walt Babson
All kinds of codes
Walt Babson
Details
Book Length
- ISBN
- 9780807580639
- Pages
- 248
- Publisher
- Albert Whitman
- Published
- 2016
- Type
- Fiction