Big Man Down #1

Moon Rising
Yokohama Japan, the big boss overlord of the criminal underground has been killed. Three of the cities most dangerous killers are suspects... One cold calculated contract killer by the name Nathan Strauss also known as "The Moonman", a brilliant and psychotic serial-killer Haru "Clever Boy" Mitsuru, and an elusive assassin known only as Valravn the Dane. All three men have worked for the Big Man before, and all three have reason to want him dead.