Avenging Alex (PB) (2013)

When Alex Solomon is placed in the witness protection program with her mother and child, U.S. Marshal John Chase is assigned to guard her. John's wife Lorraine is tired of his long hours on the job. Feeling neglected and disillusioned, she has an affair that leads to the end of their ten-year marriage. She's not quite ready to let John go, though, and will do everything in her power to win him back when she discovers that he has become involved with Alex.
As the triangle between John, Alex, and Lorraine becomes more complicated, dangerous drug lord Xavier Rivera is closing in on his target. A mole in John's department has revealed Alex's location, and Rivera sends an associate to take care of her. As John races to figure out which one of his colleagues is working with Rivera, no one is safe, not even his own kids.
Lewis Ericson has penned a dramatic thriller that is sure to keep readers on the edge of their seats.