Books 1-3 in the bestselling Math Inspectors series for kids! This paperback edition collects books 1-3 in a single 400 page volume and is NOT a boxed set. Stanley, Charlotte, Gertie and Felix are just your typical twelve-year old kids. They love to hangout after school, they love burgers and milkshake, and they love math. Wait. What? And if there's one thing they love even more than math, it's solving mysteries. Thankfully, their hometown of Ravensburg, New York has plenty of mystery. And quite a few secrets. Buy the first book in this great crime fighting series ,The Math The Case of the Claymore Diamond, today! Age 9 and up | Grade 3 and up Like Sherlock Holmes... but with Fractions! . . THE MATH INSPECTORS = Adventure and Mystery with just a bit of Math! Book One - The Case of the Claymore Diamond . Book Two - The Case of the Mysterious Mr. Jekyll . Book Three - The Case of the Christmas Caper . Book Four - The Case of the Hamilton Roller Coaster . Book Five - The Case of the Forgotten Mine . . THE MATH INSPECTORS JOURNALS The Math Top Secret Journal . The Math Math Class Notebook . The Math Make Your Own Comic Book . .