...an epic tale about what a mother will do to save her dying son, about desperation, and the inescapable pull of the past. And it has everything... The swirling, freezing intrigue of a Russian family saga... A touch of classic espionage driven by one of the most chilling villains you'll ever read... And a basis in historical fact that will terrify you. The research is perfect. The writing is glowing. The story is magnetic and unforgettable. -Blake Crouch, April 2011