The final book in the trilogy starts with Sindbad the Sailor telling his visitor that he will now tell him of his last voyage, where he acquired his greatest jewel of all. Sindbad is among the crew of another ship and is the only survivor when the ship is eaten by a giant sea serpent. Clinging to a piece of wood he survives the ravages of the ocean and eventually comes to rest on the shores of a deserted isle, until he finds a hairy ape man who abuses him and uses him as his steed for some time More...

Last in the trilogy.