This line of books was started some ten years ago with the publication of the first three volumes, or a number of years Tom, Dick and Sam have attended a military academy, but now their school days at Putnam Hall are at an end, and we find them getting ready to go to college. But before leaving home for the higher seat of learning they take a remarkable cruise on a steam yacht, searching for an island upon which it is said a large treasure is hidden. They are accompanied on this trip by their father and a number of friends, and have several adventures somewhat out of the ordinary, and also a good bit of fun for there is bound to be fun when Tom Rover is around. They lose themselves and lose their yacht, and once some of them come pretty close to losing their lives, but in the end—well, the story will tell the rest. I cannot close without again thanking my many friends for all the nice things they have said about the 'Rover Boys' stories and the 'Putnam Hall' stories. I trust the present volume will fulfill every fair expectation.