The creator, Dr. Yoskiki Tanaka, is the man behind two other well-received and regarded works (one of which is now a classic Space Opera): Legend of the Galactic Heroes (which I previously recommended here and here) and The Heroic Legend of Arslan. That's your cue as to what you should expect here.
This makes the novel, and the anime series that came of it, more like Dune than anything else. Expect good and evil characters on both sides, and lots of bastards doing bastard deeds, with a side of commentary- the sort that his other works are notable for. It doesn't have the fandom of The Heroic Legend of Arslan or Legend of the Galactic Heroes, yet, but even so it's still a solid Space Opera that you can watch and enjoy. Just remember that it's a Japanese Space Opera, so expect some cultural differences.
The novel series is not in English yet, so learn Japanese or hope for a fan translation until an official ones is released, but one way to make that happen is to buy the official releases for the English versions of the Legend of the Galactic Heroes light novels.