The trouble on Janus
Alfred Slote
The trouble on Janus
Age Rating, Reading Level & Content Guide
by Alfred Slote
The text is written at a 4th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material.
We may earn a commission from these links. Bookshop.org supports independent bookstores with every purchase.
About This Book
Jack's robot friend Danny One isn't just any robot — he's a hero with a plan to save a king! When King Paul is trapped on the mysterious planet Janus, it's up to this unlikely duo to outsmart a sneaky uncle. What dangers will they face, and can they pull off the ultimate rescue?
Themes
Quick Assessment
This middle-grade science fiction adventure follows Jack and his robot companion, Danny One, as they travel to the planet Janus to rescue a young king from his deceitful uncle. Suitable for ages 9-12, the story explores themes of friendship, bravery, and problem-solving without intense violence or mature content. Parents can expect an exciting yet age-appropriate tale that encourages imagination and teamwork.
Why we rated The trouble on Janus 9LP
The trouble on Janus is written at a Level 4-5 reading level across 175 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, The trouble on Janus works for readers up to grade 6.5.
We rate The trouble on Janus as 9LP ("Light — Physical") because the content sits in the "Mild" range — mild conflict — the kind a child encounters in normal play and sibling life. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly mild; no single dimension stands out as a concern.
Specific content flags noted by reviewers: Mild Peril.
Thematically, The trouble on Janus explores robots, science fiction, adventure, 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 robots, science fiction, adventure.
Maybe not for
- ! Reluctant readers who need a fast hook — the pacing here rewards patience.
For Parents
Content Intensity
9LP — Light — PhysicalLight conflict or tension. Mild peril resolved quickly.
Content Flags
Was our "Mild" content intensity rating accurate for this book?
Reading Insights
Hook Factor
2/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
Similar Books
Based on content and theme analysis
The trouble on Janus
Alfred Slote
The trouble on Janus
Alfred Slote
Robotworld
J. J. Gardner
Robotworld
J. J. Gardner
Robot
Paul E. Watson
Robot
Paul E. Watson
Jack and the Robbers (Umbrella Books)
Jill Bennett
Jack and the Robbers (Umbrella Books)
Jill Bennett
Robotz Rescue Heroes.
Justin Splevin
Robotz Rescue Heroes.
Justin Splevin
Jack and the Spy Heroes
Jenny Houghton Thomas
Jack and the Spy Heroes
Jenny Houghton Thomas
Details
Book Length
- ISBN
- 9780064402163
- Pages
- 175
- Publisher
- Harper Trophy
- Published
- 1985
- Type
- Fiction