I not sure how many realize this, but the books were actually written by a team of writers, well 2 writers, in parallel, defining the world, characters, and storylines. James S.A. Corey is the pen name of authors Daniel Abraham and Ty Franck. Great series too :)
And it get really interesting who their friends are down there in New Mexico :)
I read them. All of it including Novellas and stuff. They are awesome. Especially once you are used to the chapter by character thing GoT also does. But surprise, New Mexico connection :)