Usagi Yojimbo Volume 29: 200 Jizzo

Twenty years in his future, Miyamoto Usagi faces a menace from Mars! It will take all the considerable fortitude, ingenuity, and heroism that Usagi and his loved ones can muster to combat the fearsome extraterrestrial war machines and halt the alien invasion. In the end, not everyone will survive to tell the tale. Collects issues #1-#6 of the miniseries.