Hyne achieved lasting fame through two major creations. The first is The Lost Continent (1899), an imaginative fantasy recounting the fall of Atlantis through the eyes of an Atlantean warrior, which remains a classic of the lost-world genre. The second is his popular series featuring Captain Kettle, a brash, uncompromising merchant sea captain whose exploits appeared in Captain Kettle (1897), Adventures of Captain Kettle (1898), and Captain Kettle K.C.B. (1902), among other volumes.
A prolific author, Hyne also produced novels such as The New Atlantic (1900), Fancy Free (1901), McTodd (1904), and Foe of Mankind (1905). His brisk storytelling, humor, and vivid nautical detail won him a wide readership in the late Victorian and Edwardian eras, securing his place in the tradition of British adventure literature.