Horrible Harry and the Secret Treasure
by Suzy Kline
Penguin 2011
Horrible Harry
Great fit for 3rd grade
Reading level and content both target K–3rd grade · ages 5–9
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Genre
Themes
- friendship
- teamwork
- problem-solving
- curiosity
- school life
- perseverance
- respect for elders
About this book
Third-graders in Room 3B love a good puzzle—especially when Harry brings a mysterious old suitcase to school. With Mary leading the charge, the friends follow clues from their classroom to the library and even to Harry’s grandfather’s nursing home. Along the way they practice teamwork, persistence, and careful observation. This light, funny school-story mystery is perfect for newly confident readers who enjoy solving clues alongside relatable characters.
Setting: contemporary elementary school and town (classroom, library, nursing home)
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Frequently Asked Questions
Is Horrible Harry and the Secret Treasure right for my child?
Yes — Horrible Harry and the Secret Treasure is a great fit for 3rd grade. The reading level is AR 3.3, which is typical for 3rd grade. The interest level is rated Lower Grades (K–3), meaning the themes and content are designed for ages 5–9 (K–3rd grade). Themes include friendship, teamwork, problem-solving.
How long does it take to read Horrible Harry and the Secret Treasure?
At a typical 3rd grade reading pace, Horrible Harry and the Secret Treasure takes around 42m to finish. The book has 5,700 words. Slower or faster readers may vary significantly.
Does Horrible Harry and the Secret Treasure have an AR quiz?
Yes — Horrible Harry and the Secret Treasure has an AR quiz available, worth 1 point. Your child will need to take and pass the quiz through their school's Accelerated Reader program to earn credit. The quiz is typically 5–20 multiple choice questions about plot, characters, and setting.
What grade level is Horrible Harry and the Secret Treasure?
Horrible Harry and the Secret Treasure has an AR reading level of 3.3, which places it at a 3rd grade reading difficulty. The interest level is rated Lower Grades (K–3) — this reflects the age-appropriateness of the content and themes, not just the reading difficulty. A strong younger reader may handle the words fine while the themes are aimed at an older audience, or vice versa.