I am tempted to call this "Space Opera" with a tad of"Mil SF", but it's much more serious than both sub-genre archetypes would imply. No, this is just good old fashion Science Fiction, and a wonderful first novel for Watson. Rich in detail and having a story deep in both political and social commentary, I think readers will be satisfied with something that regular publishers don't put out so much these days.
The ending builds up a bit slowly, but readers I think will be satisfied with lots of military gun battles, explosions, and drama. The ending too is quite nice. It ends on a positive note but does not answer every question raised by the book. There is still a mystery to be solved, and to get my answers I'm looking forward to reading the next of this series.
Finally, let me say that this book speaks quite well for indie publishing. It's stuff like this that supports the theory about good books outside the mainstream.