Geronimo Stilton Reporter Vol. 21
Rules of the Game
Simon and Schuster 2026
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
- courage
- family
- problem-solving
- technology ethics
- perseverance
About this book
When Benjamin and Bugsy Wugsy test a cutting-edge video game system, they stumble into a dangerous mystery tied to its secretive creator. Trapped with no way out, their SOS sends Geronimo, Thea, and Trap racing to rescue them. Packed with humor, gadgets, and fast-paced action, this graphic novel blends mystery with a high-tech twist. Great for young readers who enjoy goofy jokes, teamwork, and thrilling, easy-to-follow adventures.
Setting: New Mouse City and a high-tech virtual game world (contemporary)
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Frequently Asked Questions
Is Geronimo Stilton Reporter Vol. 21 right for my child?
Yes — Geronimo Stilton Reporter Vol. 21 is a great fit for 3rd grade. The reading level is AR 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, courage.
How long does it take to read Geronimo Stilton Reporter Vol. 21?
At a typical 3rd grade reading pace, Geronimo Stilton Reporter Vol. 21 takes around 26m to finish. The book has 3,500 words. Slower or faster readers may vary significantly.
Does Geronimo Stilton Reporter Vol. 21 have an AR quiz?
Yes — Geronimo Stilton Reporter Vol. 21 has an AR quiz available, worth 0.5 points. 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 Geronimo Stilton Reporter Vol. 21?
Geronimo Stilton Reporter Vol. 21 has an AR reading level of 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.