Ricky Ricotta's Mighty Robot vs. the Uranium Unicorns from Uranus (Ricky Ricotta's Mighty Robot #7)

From Dav Pilkey, creator of Captain Underpants, and acclaimed artist Dan Santat, a thrilling friendship adventure with all-new full-color illustrations and mini-comics throughout!

Having a big best friend isn't always big fun...Ricky Ricotta loves his Mighty Robot. They do everything together, but it's sometimes hard for a small mouse to have such a big buddy! If only the Mighty Robot could find someone his own size to play with, Ricky might finally have some fun by himself.Little does Ric…