Sam Steele's Adventures on Land and Sea is a juvenile adventure novel written by L. Frank Baum, famous as the creator of the Land of Oz. The book was Baum's first effort at writing specifically for an audience of adolescent boys, a market he would pursue in the coming years of his career. The novel was first published in 1906, under the pen name "Capt. Hugh Fitzgerald," one of Baum's multiple pseudonyms.