Pilkey, Dav Ricky Ricotta's : mighty robot vs the uranium unicorns form Uranus Mighty robot vs the uranium unicorns form Uranus - New York : Scholastic, 2015 - 125 p. : col. ill. - Ricky Ricotta's . ISBN: 9789811106958 Subjects--Topical Terms: Robots--Juvenile fictionMice--Juvenile fiction