From Newbery Honor author Rodman Philbrick comes a delicious, fast-paced whodunit about two socially outcast boys who set out to find jewels hidden for a century—and unwittingly flush out a murderer.

In award-winner Philbrick's new page-turning mystery, Arthur "Bash Man" is the school thug, paid with candy to bully and threaten other students. When genius orphan Darius Drake employs Arthur to help him discover the origin of a suspicious threat, written in blood, they uncover a mystery that involves Darius's estranged grandfather, who was imprisoned for forging evidence in a search for a long-lost diamond necklace worth millions. The boys make the dangerous decision to search for the jewels themselves — and in the process, they discover that the car crash that killed Darius's parents was not an accident at all. Who will be next?Where are the diamonds? And who is stalking the boys? In his first mystery for children, Philbrick delivers yet another suspenseful, unpredictable tale filled with twists and turns that will leave readers breathless.