Amazon Description: Sixth-graders Stanley, Charlotte, Gertie and Felix did more than just start a detective agency. Using their math skills and their gut instincts, they actually solved a crime the police couldn't crack. Now the Math Inspectors are called in to uncover the identity of a serial criminal named Mr. Jekyll, whose bizarre (and hilarious) pranks cross the line into vandalism. But the deeper the friends delve into the crimes, the more they realize why they were asked to help...and it wasn't because of their detective skills.
Don't have a Kindle? You can buy one by clicking this link: Buy A Kindle
You can also read this book with the Free Kindle Reading App using every major smartphone, tablet, and computer. Click this link to get the Free App: Free Kindle Reading Apps