Joseph Flynn started off as traditionallly published, but has been published by his own Stray Dog Press for quite a while. I have read all (I think) of his Jim McGill titles, most of his John Tall Wolf books, all of his Ron Ketchum books, and a few of his non-series books. I’ve liked all that I’ve read, except for a couple of the non-series books. Right now (March 10, 2021) two of his non-series titles are free at Kindle US and UK. I’ve read and liked one of them, haven’t read the other one.