Andre Norton 
Witch World: Estcarp Cycle [EPUB ebook] 
Trey of Swords, Ware Hawk, and The Gate of the Cat

Science fiction meets sword and sorcery in these three novels by the legendary New York Times–bestselling author and “superb storyteller” (The New York Times).   On a planet in a parallel universe where magic is a reality, these three high fantasy novels of the Witch World set on the eastern continent of Estcarp once again illustrate why prolific author Andre Norton was named a Grand Master by the Science Fiction and Fantasy Writers of America.  Trey of Swords: A trilogy of swords, sorcery, and spectacular adventure set in the Witch World. In Sword of Ice, an ancient blade of incredible power that holds the spirit of the ancient hero Tolar will forge young Yonan into the greatest weapon in Witch World. In Sword of Lost Battles, only Yonan and his loyal friend Uruk can stop the dreaded Targi—the near-invincible warlock who leads the Darkness. With Yonan and Uruk missing in the past, the untrained witch Crytha must hold back the Darkness alone by countering the power of the vile sorceress Laidan with the help of a lethal, legendary blade, in Sword of Shadows.  Ware Hawk: Tirtha, last of a decimated clan, must return to her family’s ancient stronghold of Hawkholme. For protection, she hires Nirel, once a proud Falconer, now a blank shield for hire, who survives by using his gift for seeing the future in his dreams. But he cannot see everything, and a Dark One is determined to stop them.  Gate of the Cat: When she tries to help an injured wildcat, Kelsie Mc Blair is transported from the Scottish Highlands to a world where magic users, mighty heroes, and terrible monsters dwell. There she embarks on an incredible adventure, accompanied by a cynical witch who doesn’t trust her and a young warrior sworn to protect her. For Kelsie will prove to be the only one who can face off against the Lord of the Dark himself . . .