When I was in the Army in the 60's there were still a few WW2 Vets around and the tales that they told are mirrored in these books, great read.
Make that FOUR best novels. Whistle which was the last part of a trilogy starting with the two books you mentioned and Some Came Running.....Oh wait! Make that FIVE best novels. Ask any scuba diver and they will tell you that the BEST novel ever written on the subject of scuba diving is Go To The Widowmaker by James Jones. And there is even an underwater cave named "Widomaker" off the coast of Jamaica named in honor of that novel.