A jewelry store was robbed at night, the next day Milo finds  a diamond necklace in his desk at school. Jazz gives Milo 24 hours to solve the mystery before they turn in the necklace. First, they ask around school to see if any of the girls have lost a necklace. Then, they decide to see if the necklace has real diamonds or not. Then, the latest issue of ” Dash Marlowe-Secrets of a Super Sleuth” arrives in the daily mail entitled ‘ Work Backwards’. Milo keeps jumping to conclusions while Jazz keeps bringing him back down to earth and getting him to focus on facts.

Includes 5 logic puzzles after the story to keep reader’s minds sharp.