(W/A) Joey Spiotto. Grumpy Unicorn returns in this laugh-out-loud graphic novel! Grumpy Unicorn is back home after hitting the road in his first graphic novel. There's nothing that this Unicorn would love better than to just stay in* watch some TV* and veg out. But when his house is dirty* Grumpy decides to buy a cool self-cleaning robot... that due to a factory defect* is determined to conquer the world! It's up to Grumpy to save the day in this hilarious* action-packed* ridiculous adventure!