"... will leave kids (young and old) laughing and asking for more."
-- READING TODAY (International Reading Association)
"Funny, fast-paced, and irreverent. Kids will eat this with a spoon."
-- Children's author Barbara Joosse
"Hand Zack Proton to your Captain Underpants kids, please, your readers need to find these books!" -- Book Moot children's book blog
"This book is laugh-your-head-off funny and the artwork is awesome. If you have not checked out this book yet, do yourself a favor and get it soon." -- The Book Hive
"Zack Proton is one crazy astronaut and his wacky adventures will have readers howling with laughter." -- Jeanette Larson, former Youth Services Manager,
Austin Public Library
"Two intergalactic thumbs up... will make you laugh out loud. Fun for fans of Captain Underpants, Sponge Bob, and the like. Leapin' leptons, let's hope for multiple sequels!" -- Children's librarian Timothy Capehart