No. 1 of 15 in the bestselling standalone short story middle grade mystery series!Collect All 15 Short Stories and 21 Full Length Novels★★★★★ Over 15,000 reviews/ratings on AmazonAre you up for a thrilling adventure? The seaside village of Smugglers Cove is proving to be anything but quiet for the Mystery Kids as they encounter yet another mystery while exploring Brackness Castle. This ruined fortress sits on the outskirts of the village and, as they soon discover, holds more secrets than they could ever imagine.Who is hiding in the dungeons? What is in the bag? Where does the secret tunnel lead to? Set in 1950's Britain, this adventure story will suit anyone who enjoys Nancy Drew, the Hardy Boys or the Famous Five.