The farthest coast
The Farthest Shore (Original title: The Farthest Shore) book of the fantasy genre, was published in 1972, it is the third book in the Earthsea series, by Ursula K. Le Guin.
Arren (Lebannen), the young prince of Enlad, is sent by his father to Roke, the island of the wise, to ask advice from Archmage Sparrowhawk (Ged) about a strange and inexplicable malaise that is desolating the archipelago of Earthsea.. Magic is losing its power, songs are being forgotten and men and animals are falling ill or going mad.
Together they embark on a journey, without an established direction, in search of the cause of said affliction. After having sailed and toured several islands of the Archipelago, Gavilán confirms that the cause is a human being, a necromancer magician, called Araña, whom he fought some time ago for calling the dead.
They are helped and advised by the last dragon not disturbed by the desolate malaise, Orm Embar, and they head to Selidor, a deserted uninhabited island in the Reach of Westeros, where according to him evil comes from. There they first encounter an image of Spider, which prompts them to search for him around the island. Later Sparrowhawk summons the enemy on the far edge of the world, and both Arren and Sparrowhawk are saved by Orm Embar, who dies at the hands of Spider, although he does not die completely. Arren and Sparrowhawk go through a portal to the land of the dead, and meet again with Spider, who had opened the door between the two worlds, altering the Balance, to achieve immortality. Gavilán shows him that he lost his life and rejected death, becoming nothing, a nameless being; since life is a consequence of death and he did not possess both.
Finally Gavilán sacrifices his magic to close the gap between the two worlds and frees Spider. Arren drags the exhausted wizard out of the wastelands, up the mountains called Sorrow, and once in the world of the living, with the help of the dragon Kalessin, The Great, Arren returns to Roke and Sparrowhawk returns to Gont.