The Player by Rhonda Nelson [Fiction, epub/mobi/pdf] {G4mbl3R}

US Army Ranger Jamie Flanagan and two buddies left the military after their last assignment turned ugly. All 3 of them live with some form of guilt over the outcome of the assignment where they lost one of their closest friends, but as Jamie was his "buddy" for this assignment none seem to be bottling it up more than he is. Jamie seems to be trying to see how many women he can bed and drop in less than 3 dates, as a means of not forming attachments. Due to a bar fight that got out of hand Commander Garrett extracts a promise from each of them to do any favor he asks of him to keep their discharge on tract.