First, a knife. Then a flaming arrow. Now . . . bullets that explode and destroy their intended targets with a white poison that seeps into the veins on impact. Instant death. They call them Eden-killers, and never before have Ian and his people been in such danger. After all, how can someone die when he's so hard to kill? But as Kate fights for her life, Ian prepares for a battle of his own. Eden is under siege, and the city's only hope lies in the hands of four boys who shifted only recently. Four boys who are just as susceptible to Eden-killers as every other man from Eden. Ian is determined to save his family, but before he can, he must learn the truth about Eden. He must face his own demons . He must come to grips with the fact that what Kate has been searching for her entire life is what he needs, too. He must learn, for once, to let someone save him. Master is the long awaited finale in the Arrow's Flight series.