Sometimes great books come and go, waiting for another chance to be discovered and given the place on our bookshelves they truly deserve. Sword & Sorcery is no exception. In 1951, Poul Anderson wrote what was a labor of love, a Fantasy based on the mythology of his ancestors, the Scandinavians. The book was called The Broken Sword. It appeared in hard cover, had one print run, and then….disappeared. Anderson returned to writing Science Fiction, the genre he is known for 
best. He stayed away from Sword & Sorcery though it sometimes poked through in the stories he wrote for Planet Stories, such as “Witch of the Demon Seas” (January 1951 as A. A. Craig) and “Swordsman of Lost Terra” (November 1951). These stories belong to the crossbreed genre known as Sword & Planet, but are so temptingly close.
The Broken Sword recounts the story of Skafloc and Valgard, the human and elf child switched at birth by the elf-earl Imric. To regain his birthright as the son of Orm the Strong, Skafloc quests for the legendary broken sword forged by the gods. Anderson weaves a great story into the history of England during the Danelaw. We get both the mythology of Faerie and the harsh way of life at the beginning of Christianity in Europe. Much slaughter ensues as any good Norse tale should.
https://amazingstories.com/2013/07/poul-anderson-the-invisible-classic/
https://amazingstories.com/2013/07/poul-anderson-the-invisible-classic/