Helpful Score: 1
This may sound like a 'heard it from A, who heard it from B, who told them that C knew this guy D'... I was in the Marine Corps and worked with people who knew Dick Marcinko. It was well known the SEAL community that all of his early stories are based in fact, with sensitive details changed (names, countries, time of year, conversations created), and that they did not happen to him, but some of his team members. Either way, with the well known John Weisman on assist, the Rogue Warrior series moves along as well as any Jason Bourne novel. Give them a try!
