Poul's outright fantasy output was rather small, but often notable. In addition to The Broken Sword and Three Hearts and Three Lions, he also wrote Hrolf Kraki's Saga (a novel based on the original Danish king and the disparate tales about him); A Midsummer Tempest, which is a blending of sf and fantasy and thoroughly entertaining, I thought; a four-volume King of Ys, with his wife Karen: Roma Mater (1986), Galicenae (1987), Dahut (1988), The Dog and the Wolf (1988); and Mother of Kings (2003), which I believe (though I'm not certain) was his final novel. He also had scattered fantasy short stories through the years, some of which were collected together in his book entitled, simply, Fantasy (1981). (The title of this last is somewhat misleading, as it also contains sf... but sf heavily tinged by fantastic elements and certainly strongly related to the sort of fantasy he wrote.) He also wrote a Conan novel, Conan the Rebel (1980), which, while certainly not Robert E. Howard, is nonetheless a rather good book of its own, and for those intrigued by the characters of Bêlit and her brother, adds a good deal more to their tale....
He also did some critical writing on Howard and fantasy now and again, usually quite perceptive (and certainly very favorable to Howard), but those articles are scattered throughout a rather lengthy career....