As a pathological reader, my MO is to get on to an author some way or other, qualify them by reading all or part of on of their offspring, then real ALL their published work in roughly chronological order. It is bandied about that each of us has a story to tell or at least one book in them. "One-shot wonders" rarely interest me as they general shoot their entire literary creative wad in the lone work. I particularly enjoy mystery series by authors that do not take themselves too seriously.
My latest tangent has me in books with a character (not necessarily the main) whose origins are of "Indigenous peoples of the Americas" of some sort and is a shaman/mystic of sorts, full or part time. JM Hayes has a great series that features "Mad Dog", a wannabe shaman with mixed results in the nether world.
Another habit is to try to connect via email with said author to briefly encourage and appreciate them without being cloying or in any way demanding of their time. I have found many that are quite open and friendly and from these dialogues I have both given and taken recommendations of their/my favorites. It certainly fines down the process of finding talented but obscure writers.
As for this guy Bowen, he writes well and can spin a yarn from the thinnest thread. But he impossible to reach via email. Even his agent is a recluse, which is an odd characteristic for someone that represents you on your path to the public (customers), does not have a public email address.
The guy has the right to be a hermit, Buddha knows the general public can be trying, but for someone that wants us to pay to listen to him, he sure as heck can hustle though a few emails. Easy enough to hit the delete key, and who knows what gems or germs of an idea he may be missing. The whole curmudgeon deal when it comes to story tellers is mildly infantile and surely off-putting.