Covert warriors
(Book)

At a Mexican roadblock, a U.S. embassy SUV is stopped at gunpoint, three of its passengers are murdered, and a fourth is kidnapped. Everything points to the drug cartels, especially when the kidnappers say they will return the hostage if a cartel kingpin is released from U.S. federal prison. But when word gets to Castillo and his group of retired spies and special operators, they have their doubts. They believe that it's a diversion-that they murders and kidnapping were ordered by someone to lure Castillo and company to their deaths. But even knowing that may not save them. Powerful forces in the U.S. government are arrayed against them as well, and if one side doesn't get them... the other side will.