Y: The Last Man is a comic book series written by Brian K. Vaughan and illustrated by Pia Guerra. It follows the story of Yorick Brown, the last surviving human with a Y chromosome, and his pet monkey Ampersand, in a world where all other males have died. Y: The Last Man explores themes of gender, identity, and survival in a post-apocalyptic setting. The series is known for its compelling characters, gripping storyline, and social commentary.