The Polaris protocol

Pike Logan and Jennifer Cahill are in Turkmenistan with the Taskforce -- a top-secret antiterrorist unit operating outside U.S. law -- when Jennifer gets a call from her brother, Jack. While investigating Mexican drug cartels, Jack has become caught between two rival groups. The desperate call to his sister is his last before he's kidnapped. In their efforts to rescue Jack, Pike and Jennifer uncover a plot much more insidious than illegal drug trafficking -- the cartel that put a target on Jack's back has discovered a GPS hack with the power to effectively debilitate the United States.