I'm currently reading Echo Platoon by Marcinko.
I consider his fiction stuff literary bon-bons, much like the James Bond novels. They are entertaining, there is some gadgetry and snippets of reality here and there, but in the end it's just escapism. He has developed his own style of full-tilt testosterone driven prose, which you get used to after a while. I would certainly never buy the books in hardcover, but if you can get them for less at Amazon or someplace cheap, they are fun.
I definitely want to both read the book and see the movie of Black Hawk Down. I heard somewhere that some of the bad guys that our troops fought off in Somalia were really Al Queda trained terrorists. I don't know if this is true or not, but I thought that was intriguing.