Can you grok this?

[Rev. Rye]

And there's a sequel to that. Also, John Steakley's Armor. 

However, if you like The Forever War then Starship Troopers would be of interest, I think.

Actually read Armor twice over 20 years ago. Thought Starship Troopers was loosely based on it.

Starship Troopers was written almost three decades before Armor. Although I wouldn't be surprised if Paul Verehoven put a little bit of Armor into his film version, from what little I've read about it (as in I only heard about it just now and decided to look up their Wikipedia and TVTropes pages), Armor and the film version of Starship Troopers seem to take their critiques of the military in very different directions, with Armor focusing on the traumatic nature of warfare, and Paul Verehoven (if Michael Ironside is any indication) saying that "If I tell the world that a right-wing, fascist way of doing things doesn't work, no one will listen to me. So I'm going to make a perfect fascist world: everyone is beautiful, everything is shiny, everything has big guns and fancy ships, but it's only good for killing fucking bugs!," which sums up his approach very well; create a shiny, seemingly utopian vision, but letting the cracks in the insanity of the whole situation show through.

And, of course, Heinlein's novel is a very different beast altogether. One would have expected Hollywood to take a War is Hell novel, dress it up so they're not likely to lose contracts with the Department of Defense for more lucrative projects and gussy it up so it makes the whole enterprise seem more glorious. With Starship Troopers, they did the exact opposite.