Ninjak v04 - The Siege of Kings Castle (2016)

The last stand of Colin King!
Colin King, the elite MI-6 intelligence operative codenamed Ninjak, has confronted his past. He's survived the gauntlet of the Shadow Seven. He's walked into the Deadside and returned a changed man. Now his greatest trial yet will come to pass as the ruthless assassin called Roku returns to lay siege to Ninjak's present and future by destroying his life from the inside out - and only the death of Colin King will stop her.