The Lions of Lucerne book by Brad Thor

On the snow-covered slopes of Utah, the unthinkable has happened: the President of the United States has been kidnapped, and his Secret Service detail massacred. Only one agent has survived -- ex-Navy SEAL Scot Harvath. He doesn't buy the official line that Middle Eastern terrorists are responsible, and begins his own campaign to find the truth -- and exact revenge. But his search makes him a marked man by the sinister cabal behind the attack.Framed for murder by the conspirators, Harvath goes on the run, taking the fight to the towering mountains of Switzerland. There, he finds an unlikely ally: the beautiful Claudia Mueller of the Swiss Federal Attorney's Office. Together they must brave the subzero temperatures and sheer heights of treacherous Mount Pilatus -- and their only chance for survival is to enter the den of the most lethal team of professional killers the world has ever known....