Sci-Fi on the scale of the Expanse is a difficult thing to come by. The novel series is currently on its 6th principle novel with the 7th due out later this year. The Syfy channel series based on the novels has just started its second season and is an excellent adaptation. But, as is often the case, the books are really where its at. The Expanse takes hard sci-fi to new places and creates a truly immersive, frightening and exciting view of our possible future. If you haven't read it yet, start soon.
