"The Gray Man" by Samuel Rutherford Crockett is an exciting spy thriller that will not leave indifferent any fan of the genre. The main character, an ex-cowboy and former employee of the US Central Intelligence Service, is forced to go on an extremely dangerous mission to save his life. Refined skills, excellent physical training and ingenuity of the main character help him find himself in the center of an incredible story plot, where every step is a struggle for survival. "The Gray Man" is not only a very intense thriller, but also a story about dedication, courage and loyalty to the principles that are important in any life circumstances.