Callipygia — Lin Carter

Terra Magica, the fabulous land next door to our own Terra Cognita, is where trolls and monsters, warriors and wizards vie over virtuous maidens and the wealth of kingdoms . . .

Callipygia the Amazon and her stalwart knight Mandricardo had had more than enough. All they really wanted was to avoid the perils, both swordlike and sorcerous, of the many fabled lands of Terra Magica and win their way home.

But a realm of roving monsters and wild enchantments is not so easily traveled, and when Callipygia and Mandricardo find themselves trapped on a spell-run flying island from which no one has ever escaped, it signals the start of a madcap romp of magic and menace that will lead them to far-distant lands and new dangers . . .