Penny, The Review Group's reviewer Penny for Your ThoughtsThe Review Group
Children's ✦ Penny’s Take

Operation Frog Effect

Sarah Scheerger · 2019
82/100
👍 Worth It

State reading award wins and School Library Journal heavy-medal coverage are reliable signals — this one earned its praise. The eight-voice format with a graphic novel section is ambitious for a debut and it largely works, turning a classroom full of kids with very different problems into a believable community. Parents should know the immigration subplot is handled sensitively but is present.

✦ Penny’s Take — this is The Review Group’s own editorial assessment. Penny’s analytical review line researched this book from real sources and scored it across the lenses shown below. It’s an honest first-party read — not a page-by-page personal one. The gold ✓ Penny Tested mark is reserved for books Penny reads cover to cover herself.
📚 Buy the book 📱 Read on Kindle 🎧 Listen on Audible affiliate links · support the site, never the verdict
As an Amazon Associate and Audible affiliate, Penny earns from qualifying purchases. This never affects the verdict — see our affiliate disclosure.
Show the math
Verdict receipt0–100
safety82
substance82
craft84
originality82
accuracy80
hype70
age-fit88
human-eye84
Penny’s verdict82
Cross-pollinate