Yoon's art is simple but effective, with the wide-eyed calf and their heavily tabbed research book set against clean white backgrounds, and when the unicorns finally make their appearance, they bring a riot of color and glitter. a reminder that you don't need sparkles to be fabulous (though rainbow poop does help). --The Bulletin of the Center for Children's Books (starred review) Clever. [a] conversation starter on acceptance and openness. --Kirkus Reviews Just when you think all the unicorn stories have been done, Yoon comes along with this gem. White-page backgrounds amplify Yoon's simple but highly expressive and hilarious illustrations, and kids will cackle throughout Cow's dramatic emotional journey. --Booklist Sure, this unicorn might be a little short on sparkling, twinkling and having teardrops that turn into lollipops, but with a little help this one-horned wonder achieves its destiny, as a . well, readers will just have to decide for themselves.

--The Virginian Pilot.