"Great, kooky, monstrous fun!" -- Jim Benton, bestselling author of Franny K. Stein

"An apt readalike for fans of Wimpy Kid, and Gravel deploys spot art, larger illustrations, word balloons, and chunks of text with great success in the layout." -- Bulletin of the Center for Children's Books

"A visually interesting mix of illustration and story, punctuated by numerous lists, comic panels, and cartoon diagrams and led by a smart female protagonist. A bubble-gum crowd pleaser with wide audience appeal." -- Kirkus Reviews

"This laugh-out-loud book is a perfect pick for transitioning readers with a penchant for silly stories, or graduates of the Fly Guy series." -- Booklist

"Researching the creature she dubs Meh fills Olga's days with purpose and her notebook with hilarious quips ("He doesn't like it when I put a sock on his head.... He's really scared of bananas"), which Gravel captures in her signature brand of chunky cartooning, accented with red." -- Publishers Weekly

"Readers will get lots of laughs out of the steady stream of gross-out jokes, as well as Olga's misanthropic humor, though her attitude toward humans softens slightly by book's end." -- Publishers Weekly

"[An] obvious sell to fans of animals, but it will also hit a humorous note with anybody who has felt a little left behind by these things we call humans." -- Bulletin of the Center for Children's Books

"For fans of Dork Diaries and Captain Underpants, Olga will be a big hit. Kids will devour the toilet humor along with the quick one-liners Olga throws out." -- School Library Journal

"Animal-loving Olga makes her biggest scientific discovery yet in this amusing story!" (Recommended on "The Ultimate Summer Reading List for 9- to 12-Year-Olds--2017 Edition") -- Brightly