Children's ✦ Penny’s Take
Halley Harper, Science Girl Extraordinaire
Tracy Borgmeyer · 2020
74/100
👍 Worth It
Borgmeyer packs a genuine STEM mission into an adventure story — the White House theft plot creates real stakes, and the built-in experiments give the book life beyond the last page. A Readers' Favorite Award finalist nod confirms the series has found its audience. The lack of major press coverage keeps the score modest, but for a girl eyeing a science fair, this is an easy recommendation.
✦ 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.
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Show the math
Verdict receipt0–100
safety93
substance76
craft72
originality74
accuracy78
hype65
age-fit88
human-eye73
Penny’s verdict74
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