How much do the authors of all these fishing books make?

[Mr. Sandman]

I was reading over this weeks fisherman and Toby had an into discussing his fishing library. I have a similar one and for a while collected a lot of cool fishing books. I went down to browse over it and pick out something to look at the other night and noticed there is a lot of repetition in this library. I have read all of them some are very old and not current with today's methods of fishing at all but interesting none the less. But they all talk about fishing of some form.

With all these books out... say, on how to catch striped bass (for instance) how is it that there is any money in this? The market is limited by SB fishermen, I looked this up on the internet (average $ authors make) and if you divided the approx money they make by the time they had to have put into it... It appears that a minimum wage job would actually pay more. Am I wrong? I know they are doing it because they love it.

I know the article rate is absurdly low, I would charge more just for typing up an invoice they then get for an article in these fishing mags. But how much do you think a decent author makes for a book on surf casting? Just a thought...I am not thinking about writing a book nor do I want to know how much any individual makes ...really. Just curious about the ballpark royalties an author makes on fishing