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, as they navigate a post-apocalyptic world where all other males have died. Y: The Last Man is known for its compelling characters, thought-provoking exploration of gender and society, and its gripping storyline.