"What's not to love about a book that makes an eight-year-old think science is cool?"
- The Globe and Mail

"Gardy and Holinaty have a good sense of the ideal delivery for a middle-grade audience... The combination of clear, matter-of-fact text and lively design makes this a slender study that's big on information."
- Kirkus Reviews

"This book is so interesting and filled with so much valuable information that it will be read cover to cover."
- Library Media Connection, STARRED REVIEW

"There's plenty to offer in this complex but comprehensible work ... an entertaining and informative eye-opener." - School Library Journal

"Fascinating and age-appropriate ... written information is perfectly complemented with the amusing illustrations."
- Canadian Review of Materials

"Just the right dose of gross ... This scientific exploration of the cooties is compelling and entertaining. The book's engaging design, featuring charts, graphs and experiments, will encourage further inquiry and discovery."
- The National Reading Campaign

"An entertaining and informative book for inquisitive children."
- Education Library, The University of British Columbia

"A fascinating introduction to microbes and how they affect us ... This is a recommended title that will have readers want to try some of the activities and learn more about the microbes that affect us all. It might also inspire science fair projects that lead to who-knows-what discoveries."
- Resource Links