As this new collection of Brian K. Vaughan's bestselling series Y: THE LAST MAN begins, we catch up on the adventures of Yorick's monkey Ampersand (whose biology may hold the key to stopping the male-killing plague) and tells the origin of Yorick's mysterious protector, Agent 355 as Yorick searches for his fiancee in Australia, with deadly results. From Australia, Yorick and his companions continue on to Japan to learn the truth behind Ampersand's abduction. The fourth volume of the critically acclaimed, genre-defining graphic novel series is here with Y: THE LAST MAN BOOK FOUR! Collects issues #37-48.