This is sci-fi. This is a big, 500 page block of sci fi. It is not bad? It is not original in its ideas at all, but the execution is pleasingly competent and generally enjoyable. It is a bit like an actiony 1970's sci-fi book, but updated with modern graphics. The setting is a few hundred years in the future, where we have developed fusion drives and have started colonizing the solar system, but do not yet have AI's, FTL, or any truly transformative technologies. Events occur! There is tension between the wealthy inner planets, and the frontier miners of the outer planets. More Events occur! The characters are quietly likable & usually not too obtrusive. There are some brief moments when the author tries to introduce larger ideas or psychology, but these can be safely ignored. The author does a better job with the small details of Belter life, and in the thought he has put in to the habits, tics, trade, and living quarters of people who have never been in a gravity well. I particularly liked his aural descriptions, both of the everyday sounds of spacecraft and of when they are falling apart.
I'm not sure I want to read the rest of the series in my current state of supreme physical wellness (apparently the author has written enough of these novels to fill a small shipping container?), but I would definitely turn to them if I was bed-ridden by tuberculosis.