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 face off against a flock of flightless foes!Ricky and his Mighty Robot have made a mess. They've been mean to Cousin Lucy, and now they must make it up to her. But their surprise present for Lucy turns into a trap when President Penguin from Pluto plots to take over Earth. President Penguin is peeved because Pluto is no longer considered a real planet. Now he plans to make things very unpleasant for anyone who stands in his way. Can Ricky, Lucy, and their friends defeat this tiny terror and keep Squeakyville safe?

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.

From the creator of CAPTAIN UNDERPANTS, comes a BRAND NEW out-of-this-world friendship adventure - in full colour! Ricky may be small in size, but he's a big hero with an even BIGGER best friend! Like most best friends, Ricky and his Mighty Robot do everything together. So when the Unpleasant Penguins from Pluto invade Squeakyville and try to take over Earth, it's up to Ricky and his Mighty Robot to fight these flightless felons and send them back to their own (former) planet! This is a never-before-seen RICKY RICOTTA adventure!

From the creator of CAPTAIN UNDERPANTS, comes a BRAND NEW out-of-this-world friendship adventure - now in full colour! Nimrod Night Crawler has created a wormhole so he can take over the world, and Ricky's Robot is trapped in a deep pit! Without his Mighty Robot, it's up to Ricky to put a stop to this nightmare from Neptune!

From the creator of CAPTAIN UNDERPANTS, comes an out-of-this-world friendship adventure - now in full colour. Ricky Ricotta and his Mighty Robot battle for the safety of the solar system once again! This time, Sergeant Stinkbug arrives with a plan to kidnap the king of the world, but he ends up with Ricky's little cousin Lucy instead!

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 Ricky know, his wish is about to come true. Evil Uncle Unicorn has a top-secret plan to trap the Mighty Robot so that he can take over Earth, and he's got a giant surprise in store. Once again, it's up to Ricky to save the planet -- and his best friend!

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