Review from Booklist

From the opening pages, the bullets fly and the bodies pile up. Through the carnage, Gentry remains an intriguing protagonist with his own moral code. The villain's motives are fuzzy, though he is quite nasty. Comparisons will be made to Jason Bourne, but the Gray Man is his own character. The ending screams for a sequel, but it will be difficult to maintain the intensity level of this impressive debut."--Booklist