Yes, the cookbook I reviewed was self-published.
And for the affiliate links, see
Quoting from a WordPress staff member:
"If it's a reputable, relevant store (and not MLM), a single sidebar link, and a real blog, I don't see a problem. The docs refer to Amazon specifically, but you can substitute another reputable store/site if there's something more appropriate. If you have a real blog about fishing, then we don't mind a referral link to your local fishing store that gets you a discount or credit or whatever.
Again, "real blog" is the key. WordPress.com is for blogs. If your blog is a real blog that real people actually want to read, the odd affiliate link is no big deal - worst case, if it attracts some complaints, we might ask you to tone it down a little."