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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 Major Monkey invades Earth, Ricky and his Robot race to save the day once more. But Major Monkey has a plan to get rid of Ricky's Robot so that no one will be able to stop him! Now it's up to Ricky to rescue his friend and keep Major Monkey from menacing mousekind!
