Thanks very much, Ashley, I appreciate that!! The series is called Worldwar, the first book is called, In the Balance. In his storyline, they are called The Race, and are a lizard-like species, but the premise is the same! A very good read, there were 4 books in the worldwar series, then there was a follow-up dealing with colonization. See here for a background and info, my game followed very closely, I was going to make extremely alien looking vehicles, but decided on a more late 20th, early 21st century look instead, since that is roughly the level of the K'talan ground forces. Here is a link-
http://en.wikipedia.org/wiki/Worldwar.