Ricky Ricotta's Mighty Robot vs. The Mecha-Monkeys from Mars

From Dav Pilkey, creator of Captain Underpants, and acclaimed artist Dan Santat, an out-of-this-world friendship adventure with all-new full-color illustrations!

Best friends always stick together — especially when they are in trouble!Ricky Ricotta and his Mighty Robot always watch out for each other — that's what friends are for! This time, they've managed to mangle the Ricotta family's minivan. Somehow they have to find a way to make up for their mistake.When a mean little Martian named …