I started getting unsolicited emails from Marian Brown PR (website here: http://www.marianbrownpr.com). No idea how they got my email address. I've unsubscribed, but we'll see if it works.
Apparently Marian Brown has 20 years of experience in publishing, and she was the publicist for Anne Lamott's Bird by Bird. Looks pretty legit, but I'm automatically wary of anyone who randomly signs me up for their email list without my say-so.