This Verne adventure is indeed a mystery and also a satire on the Crusoe genre. Our characters are larger than life, as well they should be - Verne expects Americans to perform epics. Young Godfrey goes to sea for adventure before settling down with his bride to be. His incredibly wealthy uncle sets him aboard one of his steamers which founders some days out, leaving Godfrey and his companion, a dance and comportment instructor, near the shore of a uninhabited island. They set up residence, benefiting from livestock, some supplies and tools which apparently also wash ashore. Later, a canoe full of savages land in order to cook up a prisoner. Godfrey helps the latter escape, and the grateful native becomes a "Friday". While the island initially seems free from any predators, it is not long before Friday saves Godfrey from a bear, a tiger and a poisonous snake. But when swarms of lions, tigers, hyenas and crocodiles attack it is more than they can handle. Where do all the beasts come from? What is the cause of the occasional plume of smoke Godfrey notes on the island? Those are some of the mysteries about which the reader will be enlightened.