I met Cooper at a convention this past year. She was pleasant enough and enjoyable to talk about the craft of writing. She writes a very niche genre: Military Sci-Fi with lesbian protagonists. The book is one of her first and stars one of her major characters: Tannis. The author is super prolific with hundreds of books published in the sci-fi world she has created.
There is actually a pretty cool KDP (Amazon Authors) video interview worth watching if you are interested in how authors can make it through independent publishing. One well respected system is definitely the "Put lots of stuff out there." More notably, I see theories like "20 books to $20,000" or similar titles. Cooper seems to have made it work for her and kudos.
See her interview HERE
My Review on Amazon:
A cocky protagonist saves the space colony from a nuclear explosion. What follows is a mystery / conspiracy laden sleuth in space with cyborg body parts, tech and AI. There is some character development but the real reason to get on this rollercoaster is for the non-stop thrills. The author writes excellent action scenes that put you in the moment.