Billy Sure, kid entrepreneur

Discovering that he has been exchanging emails with a corporate spy from a rival company, seventh-grade innovator Billy Sure and his best friend set a trap to catch the culprit before he reveals Sure Things, Inc.'s valuable secrets.

"Everyone is talking about Billy Sure, the twelve-year-old genius and millionaire inventor whose inventions have become instant hits. Billy's lucky because in addition to being a rich and famous inventor, he already knows what he's best at: inventing, of course! He wants to help other kids figure out what they're best at too, and his latest invention, 'The Best Test' will do just that!"--Amazon.com.

Billy's mom has always claimed she is a scientist doing research for the government, but he's always suspected that there was more to the story. And as it turns out, he was right! His mom is a spy, and now she has enrolled him in spy school so he can create inventions for her top-secret spy unit. Billy created an invention for his mom but the blueprints disappear it's up to Billy to find out who stole them.

A new inventor comes into town claiming to have perfected invisibility. Billy may need his help to perfect his own invisibility invention.

What's a kid entrepreneur to do when he loses his math homework? Invent the Everything Locator, of course! Billy's next invention is a device that will find any lost item and return it to you. But the Everything Locator has one teeny, tiny problem, it returns every item that Billy has ever lost, all at once! Will Billy find a way to make everything right with the Everything Locator? Will he even be able to dig his way out of this pile of junk? Find...