It appears that Joe Haldeman’s excellent Military SF novel “The Forever War” is on sale for the Kindle for a measly $4.95. If you haven’t read it yet, you definitely should, and if you have, you should get a Kindle copy anyway just because.
I’d have to lie if I said that “The Forever War” wasn’t at least somewhat in the back of my brain when I wrote my own MilSF novels. (The first one is still in Slushpile Hell, and the second one, being a sequel to the first, will probably not get any traction until #1 is sold.)