This is a series about the first ancient assassins. Everyone used them. From Ancient Greece to the frozen North, rulers have always needed their elite troops – men trained to perfection, skilled with a devastating array of weaponry – men who will track down their leader's enemies and kill them. All assassination teams faced one big problem: getting close enough to kill. No one in the ancient world had sniper rifles. As a result even the most formidable Japanese Ninjas got captured and tortured.