I have published three books (with a publisher), and I can confirm that Credibility was one of the bigger motivations both for writing them, and for going with

I have published three books (with a publisher), and I can confirm that Credibility was one of the bigger motivations both for writing them, and for going with an established publisher. For some of them, I started self-publishing with leanpub and was later shepherded into the publisher, and I got the impression I could make at least the same amount of money on leanpub.