Very Good Condition. Paperback. Argonia #1 and #2 Omnibus, "Song of Sorcery" and "The Unicorn Creed" 1987.
Songs from the Seashell Archives, vol 1
In the enchanted relm of Argonia, Maggie Brown was a hearthwitch, good at whipping up banquets and starting up fires. But her magic was not much good for tracking down her faery step-sister who'd run away with a gypsy. So she set out with Ching, the talking cat, and Colin Songsmith, a travelling minstrel, to bring back the beautiful Amberwine in Song of Sorcery.
In The Unicorn Creed, the king has made her a princess, and therefore a good catch for the local noble bachelors. Only problem is, she doesn't want to get married. She wants to be with Moonshine, whose Unicorn Creed, as he understands it, forbids him to consort with anyone except a chaste maiden. It's rather a touchy situation, and so Princess Maggie abandons her crown and with Moonshine, she and Colin set out to see if they can find a loophole in Moonshine's creed.
Of course, in the process they have to try to save the land of Argonia again, this time from a were-man, a revolutionary nymph, a town's worth of zombies, an ice worm and an evil wizard.