The book "The Nantucket Motor Boat Club; or, The Mystery of the Dunstan Heir" by the author Hancock, G. Irving (Gerry Irving) is an exciting adventure story about a friendly company of young sailors who embark on a dangerous journey on their motor boat. They investigate a mystery related to deadly circumstances that threaten a peaceful small town on the American coast. Exciting adventures, unexpected plot twists and friendship of the main characters help them uncover the secret of Dunstan's heir and save the town from danger. Will they be able to solve the riddle and get out of this dangerous situation? This fascinating book will attract the attention of readers of any age with its tense plot and unpredictable turns of events.