In the book "Houseboat Mystery" by Gertrude Chandler Warner, the story follows the beloved characters known as the Boxcar Children as they embark on an adventurous mystery set on a houseboat. The children navigate through various challenges and clues, unveiling secrets hidden within their quaint surroundings. With their sharp wits and teamwork, they work to solve the central mystery while enjoying the excitement of life on the water.

Warner's narrative seamlessly combines elements of mystery and childhood adventure, engaging young readers with its suspenseful plot. The children exemplify problem-solving and camaraderie, emblematic of the series that has captivated generations, alongside other cases like "The Mystery of the Midnight Dog," "The Haunted Clock Tower Mystery," and many others, ensuring that every tale is filled with intrigue and discovery.