Not a bad book, but doesn't end well.
The idea is that there are 3 earths in parallel dimensions: one where the American revolution never happened, one where the dinosaurs never died out, and ours.
In the mirror human earth, the reptilians have invaded using dimensional gates hidden under 14 sacred sites around the earth. They do this by stealing the human's "souls" -- the electromagnetic field around our bodies that contains our personality. Then the humans become docile and willing to be slaves.
Next they're coming for our earth, with only one half crazy writer that's plugged into all 3 earths through his writing to stop them. Worth a read.
Archaeologist Martin Winters gets out of the collapsing Great Pyramid of Khufu just in time to see a gigantic lens arise from the rubble. Simultaneously at equally ancient monument sites all over the world, other lenses emerge. What's happening is a kind of alien invasion, but the aliens, whose advance agents have been subverting human society for some time, aren't really another species. They're their world's degenerates, whose earlier incursions into human history inspired the way the evil beings of religious mythology have been represented. In short, they're demons, fortunately killable but possessed of awesome power by the standards of Martin's world, which is one of three parallel Earths. The others are the invaders' and ours, in which buff sf writer Wiley Dale is compulsively and automatically writing Martin's story, which is more transmission than story. Eventually the demonic aliens pop up in Wiley's as well as Martin's Kansas homeland. Each Earth has advantages over the others; one of those, in both Martin's and the aliens' worlds, is that the physical existence of the soul has been discovered. The implications of that discovery drive the action of Strieber's hyperactive cosmological thriller. Despite Wiley and his cop buddy's excruciating hardy-har-he-man palaver and the exposition turning to cardboard whenever love is mentioned, it's immensely entertaining, and it's optioned for a big, splashy, FX-laden movie. Oh boy!
- Booklist
http://www.amazon.com/2012-War-Souls-Whitley-Strieber/dp/0765318962/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1200084669&sr=8-1
