When a little boy throws a coin in a well asking for a pet unicorn, he has no idea what kind of trouble he's in for. Unbeknownst to him, unicorns make the absolutely worst pets: they shed, they poke holes in your ceiling, and they make a big mess. With a knowing wink from Ame Dyckman, author of Wolfie the Bunny and cheerful illustrations from Rory the Dinosaur creator and Tumblr star Liz Climo, this rollicking story shares all of the ways a pet unicorn can ruin your life, and is sure to have readers in stitches.