(W) Brian K. Vaughan (A) Pia Guerra, Jose Marzan (CA) Massimo Carnevale. The first ten issues of the award-winning series written by Brian K. Vaughan (EX MACHINA, Lost) are collected in this new trade paperback! It's the saga of Yorick Brown - the only human survivor of a planet-wide plague that instantly kills every mammal possessing a Y chromosome who searches the world for his lost love and the answer to why he's the last man on earth.