Usagi Yojimbo: Lone Goat & Kid (Usagi Yojimbo: Lone Goat & Kid #6)

Yagi, once an honored samurai, is now disgraced and banished from his clan. He makes his living as a professional assassin traveling with his son, Gorogoro. His former clan, though, wants him dead and have sent many samurai after him. None of them survived their encounter. Counselor Wakame has come up with a bold new plan: hire Yagi to kill a warrior equally as skilled-the ronin Usagi!