Leviathan Wakes--First in "The Expanse" series by James S. A. Corey. It's 400 pages, and very good, but I'm a little concerned that there's gonna be like 7 books in this series. BTW, this is NOT "Game of Thrones in Space."
My newest passion is the Expanse series of space-opera novels. Classic solar-system sci-fi that turns into an epic before the end of the first novel, "Leviathan Wakes". For fans of Heinlin and Asimov, with more than a touch of Wm. Gibson.. outstanding work.