Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 2: The Revenge of the Ridiculous Robo-Boogers (Captain Underpants #7) (Digital Audio Download Edition) Free Audiobook Download by Dav Pilkey

The second installment of the series, "The Big, Bad Battle of the Bionic Booger Boy," begins with George and Harold trying to sneak into the school during recess. They're looking for Captain Underpants because he's on a quest to find out what really happened to Harold in his father's office after everyone thought that he was acting crazy. When they finally find Captain Underpants, the three are flanked by Robo-Boogers--robot boogers that can disguise themselves as any student--forcing them back into the building. The trio makes their escape when one of their classmates falls off of a bicycle and breaks her arm.

In the second book of the seven-part series, Captain Underpants and his friends must stop a robotic Booger Boy from taking over the world. With their bionic boogers, they can absorb the power that fuels an army of cyborgs and put an end to war for good.

Captain Underpants is turning 11, and his birthday party requires a giant bionic booger boy to keep the guests entertained. Unfortunately for Mr. Krupp, he's not the only one who wants to put on a show.

The two captains try to stop the Robo-Boogers from smearing their boogers all over the world, but in order to succeed they must use their powers for good!

The students of George and Harold's school are bored and have become addicted to playing games. They start up a game called "Bionic Boogers." In this game, everyone is given a small device that shoots boogers out of their nose. There is also one device, the Bionic Booger Boy, that shoots out large boogers that can hit the other players. The basic idea is to collect as many boogers as possible without getting hit by one of these bad boys.

In the second part of the Captain Underpants book series, Captain Underpants and his friends battle against Captain Trickster and all his evil Robo-Boogers. These robots, which are more powerful than any human being, create havoc in the school by ruining a science fair project then attacking the kids who tried to stop them. In response to this, Captain Underpants comes up with a super-secret plan involving duct tape, cafeteria food and toothpaste.