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From Edgar Award-nominated author Martha Freeman comes a compelling middle grade mystery following a young boy working at his family's secondhand store that is a steal-your-heart story about family and friendship.Arthur Popper helps out in his family's Boulder, Colorado, junk store, Universal Trash, a place so full of cool stuff it inspires awe in first-time shoppers. When it comes to ukuleles, peppermills, and rhinestones, Arthur knows what's what. But unlike his motorcycle-riding grandma and his namesake, King Arthur, he's not brave or adventurous. Then Arthur finds a chipped teacup, of all things, and realizes it's the key to solving the perfect crime - a crime only he knows about. With help from a supernatural sidekick, his best friend, his annoying little sister, and a sad-faced police officer, Arthur embarks on the hard work of detecting.