The Broken Sword (FANTASY MASTERWORKS) - Tapa blanda

Thor has broken the sword Tyrfing so that it cannot strike at the roots of Yggdrasil, the tree that binds together earth, heaven and hell. But now the mighty sword is needed again to save the elves in their war against the trolls, and only Scafloc, a human child kidnapped and raised by the elves, can hope to persuade Bolverk the ice-giant to make Tyrfing whole again. But Scafloc must also confront his shadow self, Valgard the changeling who has taken his place in the world of men.

Poul Anderson (1926-2001) was born in Pennsylvania of Scandinavian stock. He started publishing science fiction in 1947 and became one the great figures in the genre, serving as President of the Science Fiction Writers of America, winning multiple Hugo and Nebula awards, and was named a SFWA Grand Master. He collaborated regularly with wife, Karen, and their daughter is married to noted SF writer Greg Bear. Poul Anderson died in July 2001.