Retired US Army Colonel Ryan Gavin just wants to relax and enjoy his dog, his sailboat, and a peaceful life in Miami, but no. First, he and his best (human) friend, Capt. Louis Alverez, are attacked by machine gun fire. Then, Ryan's little brother - who also happens to be the president of the United States - puts in an urgent call for Ryan to help on the complex extraction of a highly prized Russian couple. As the premier criminal investigator in the country - or world - Ryan jumps to the president's request, all the while dodging a vengeful mystery gunman in the latest action adventure, The Code Book, from William H. Blair.