Yup can confirm. I after the last season of the expanse, I really had to just read novels. Me who hardly read books after age of 25. It's just so good. Expanse physics is relatively speaking so realistic. No magical convinient inertia or gravity.
There not being anymore Firefly is always sad whenever I think about it. I noticed there was a series of books when I was in the bookstore the other day. I have no idea if they are directly related or not. It must at least be in the same universe.