Y: The Last Man is a post-apocalyptic science fiction comic book series written by Brian K. Vaughan and illustrated by Pia Guerra. It tells the story of Yorick Brown, the last surviving human with a Y chromosome, and his pet monkey Ampersand, as they navigate a world where all other males have died. Y: The Last Man explores themes of gender, identity, and the nature of humanity, while also delivering a thrilling and suspenseful story.