Do you want your kids to love reading, to get lost in an adventure, and maybe even enjoy math? THE MATH INSPECTORS HAVE AN ANSWER! Each book in this popular mystery & detective series is designed to draw readers aged 9-12 into a mystery so intriguing, with characters so smart and funny, that they forget they're also learning about math. - Buy the second book in this great crime fighting series, The Math Inspectors: The Case of the Mysterious Mr. Jekyll, today! Age Level: 9 and up Grade Level: 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 Three - The Case of the Christmas Caper. - Book Four - The Case of the Hamilton Roller Coaster. THE MATH INSPECTORS JOURNALSThe Math Inspectors: Top Secret Journal. - The Math Inspectors: Make Your Own Comic Book.. - The History Mystery Kids 1: Fiasco in Florida. - The History Mystery Kids 2: Magic in Michigan. - The History Mystery Kids 3: Midnight in Massachusetts. - The History Mystery Kids 4: Camping in Colorado.