I'm glad I came across this. This wasn't obvious to me when I signed up since domain mapping and web site building were part of the attraction. I looked at a lot of FAQs, features, and forums but somehow missed this important piece of information. I'm grateful I found out before mapping my domain names and filling in content. I know now that this isn't the place (attractive though it may be) for my publishing web site since, even though the majority of its content is free, I will want to sell the book I've published on that site--paypal buttons and all.
My remaining two question are about my blogs. I have an author's blog, just created, that I would primarily use to encourage feedback from potential readers regarding ideas for my next novel, etc., and to discuss things of interest (hopefully) to other writers and people interested in writers. I do have one published novel and would like to link to the Amazon sale page for that novel and to my publisher's web site. I'd like to post a picture of the novel, too, and have one blog saying that this is the novel I wrote and something about why I wrote it, how, and what it's about. Is any of this inappropriate for wordpress.com?
My publisher's blog is also here on wordpress, just getting started--no real content yet. The idea of the blog is to keep the public informed of changes to content on my small publishing company's web site. Nearly all of the content on that web site will be free with a creative commons license. The site will sell my book and perhaps later on a few more items, and it may offer writing courses and such for a fee. If the blog doesn't name items for sale, only tell about a new article or story available for free on the site or mention in general if there were new bargains on the site, and of course, have one link in the sidebar to the site ... is that okay or inappropriate?
I appreciate any help given here, and thanks to gloriahopkins for asking the initial question.