Jeff Miller 
Nerdy Dozen #3: 20, 000 Nerds Under the Sea [EPUB ebook] 

Can the nerds handle the high seas? Its anchors away for this motley crew of middle grade, video-gaming heroes. In the exciting third book of the Nerdy Dozen series, Neil Andertol and his friends are in for their toughest mission yet!Neil and his crew have reunited at Reboot Robiskis video-game convention in order to try the brand-new underwater game, Captain Jollys Shark Hunt. Except that their win only leads to trouble.Neil, Sam, and Biggs are captured by the real Captain Jolly, who needs their video-game skills so she can destroy the world. As they embark on an underwater adventure, can the Nerdy Dozen save the day before everything is KOd?