"The Farthest Shore" is the third book in Ursula K. Le Guin's Earthsea series. It follows the journey of Ged, a powerful wizard, and a young prince named Arren as they seek to save their world from a mysterious darkness that threatens to consume it. Their adventure takes them to the farthest reaches of Earthsea, where they confront the nature of life and death. The novel explores themes of mortality, balance, and the importance of accepting one's own limitations. As Ged and Arren travel, they encounter various challenges that test their courage and wisdom, ultimately leading to a deeper understanding of themselves and their place in the world.