Pia GuerraPia Guerra.

Pia Jasmin Guerra is an American-born Canadian comic book artist and editorial cartoonist, best known for her work as co-creator and lead penciller on the Vertigo title Y: The Last Man. She has worked in the comics industry since the 1990s, and has also contributed to Doctor Who: The Forgotten, along with DC and Marvel comics. Guerra regularly does cartoons for The New Yorker, MAD Magazine and The Nib.