Fields of Fire

The fifth entry in Kloos's Frontlines series continues the war with the Lankies. This time we get the battle of Mars: and a very tough battle it is. During the course of the almost constant fighting we learn a little bit more about the very alien enemy that has pushed humanity almost to the brink of extinction. But still, almost everything about them–their motivation, origin, culture, economy–remain unknown. (I keep wondering where Kloos is going with this.) The main character takes some hard knocks.
Good military SF. But, it is not really a stand-alone book. One should read the previous volumes first.