Meet Ricky Ricotta. He's an ordinary mouse with ordinary problems-sometimes he gets picked on at school and feels a bit lonely. Then, one day, a giant flying Robot enters his life! The evil Dr Stinky has created the Robot to try to destroy Squeakyville. But the Robot doesn't want to harm the mice, and he tries to escape his conniving creator. Thing is, he can't-not without Ricky's help, that is...Together, Ricky and the Robot must defeat Dr Stinky and save the city!

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! Ricky Ricotta and his Mighty Robot are ready for the best day ever!Today is Ricky's birthday, and it's off to a great start! After peanut-butter pancakes and presents, Ricky's parents are taking him and his Mighty Robot to see dinosaurs at the museum. And they have a surprise for Ricky: His cousin, Lucy, is coming with them! Ricky thinks Lucy is a real pest. Suddenly, things aren't looking so sunny anymore.At the museum, there is another surprise in store. General Jackrabbit, an evil genius from the planet Jupiter, is jumping for joy! He has just created three Jurassic Jackrabbits to help him take over Earth. Can Ricky and his Robot beat these big, bad bunnies? Or will this end up the WORST birthday ever?

From the creator of CAPTAIN UNDERPANTS, comes an out-of-this-world friendship adventure - now in full colour! This is the story of Ricky Ricotta, a lonely little mouse who befriends a giant robot, takes on the school bullies, and saves the city from an evil rat scientist, Dr Stinky McNasty!

Infuriated by the declaration that Pluto is no longer a planet, President Penguin and his penguins invade Earth and it is up to Ricky and his robot pal to defeat them--with some help from Ricky's cousin Lucy and her pets.

An out-of-this-world friendship adventure by Captain Underpants creator Dav Pilkey, with full-color art and mini comics by Caldecott Medalist Dan Santat. Ricky Ricotta and his Mighty Robot are in for a sticky, slimy surprise! Ricky and his Mighty Robot have built the coolest fort Squeakyville has ever seen, and they can't wait for the fun to begin! But then Cousin Lucy arrives with her pets and plans to turn it into a princess castle -- what a party pooper!Things completely fall apart when Nimrod Nightcrawler, a wicked worm from the planet Neptune, digs a tunnel under Ricky's fort, trapping the Mighty Robot. Now it's up to Ricky and Lucy to put a stop to this nightmare -- and save their friend!

Ricky Ricotta and his Mighty Robot crash the family's mini-van while using it as a skateboard, and they have to earn some extra cash fast to pay for repairs. Meanwhile on Mars, mean Major Monkey is making plans to enslave all of mousekind. Illustrations.

A boxed set of four novels from Dav Pilkey's humorous series about Ricky Ricotta.