The Ragamuffin Mystery by Enid Blyton

In this thrilling adventure, a group of friends find themselves embroiled in a mysterious case during their holiday in a quaint seaside village. Their curiosity is piqued by the appearance of a ragamuffin boy who seems to be hiding secrets. As they delve deeper, they uncover a web of intrigue involving a missing scientist and a hidden invention that could change the world. With their characteristic bravery and teamwork, the friends navigate through a series of challenges, ultimately unraveling the mystery and bringing the culprits to justice.