Colorless Tsukuru Tazaki and His Years of Pilgrimage is a novel by Haruki Murakami that tells the story of a young man named Tsukuru Tazaki. Tsukuru, who has been fascinated by railways since childhood, suddenly loses his four best friends. This event plunges him into deep depression and he begins a journey of self-discovery. The book touches on themes of friendship, loneliness, loss, and self-awareness, all conveyed in Murakami's unique style.