"The Air Mystery of Isle La Motte" by E. J. Craine is a novel written in the early 20th century. The book follows the thrilling adventures of step-brothers Jim Austin and Bob Caldwell as they navigate a world of flying and intrigue aboard their plane, "Her Highness." Their journey takes them to Quebec and Isle La Motte, where they encounter the mysteries of smuggling and turkey theft, intertwining their experiences with local characters and law enforcement. At the start of the novel, the boys land in Quebec and meet a Canadian Mounted Policeman, Sergeant Bradshaw, who highlights concerns about illicit activities in the area. This encounter sets the tone for their summer adventure filled with secrets. As they explore their surroundings, they express curiosity about a mysterious boy working on the Fenton's turkey farm and decide to form a "detective bureau" to solve the three mysteries they have identified: the identity of the boy, the disappearance of turkeys, and the presence of suspicious characters linked to smuggling. The opening chapters establish an exciting blend of youth, adventure, and mystery, drawing readers into the step-brothers' world as they seek to unravel the enigmas surrounding them. (This is an automatically generated summary.)