Now, yes, I follow several authors on Facebook and their blogs and I do find out about their upcoming books from them. But those aren't the only places I use to check out about new books. Because, after all, my favorite authors can only write so fast and there are other authors out there to be discovered. And I do read very fast.
I guess I'm old-fashioned (and a former librarian). I'm used to finding out about new books via journals like Locus. I gave up on Analog and Asimov's because, while they have book review sections, somehow the reviewers either never reviewed books I was interested in or, if they did, it was always long after the book was out and I had already purchased it. Newsletters from bookstores I frequent, like the independent bookstore in my town (The Book Shelf) or Uncle Hugo’s in Minneapolis are also useful. Locus and Uncle Hugo’s paper newsletter always arrive about the same time each month, so that’s a good time for me to look for interesting titles to order.
Ebooks are usually more convoluted to find out about. Yes, I still use my previously mentioned sources and decide whether I want to order the paper version or go to Amazon and order the ebook version for my Kindle. But as an author who still has one book only available in paper at Amazon (complicated story: Talking to Trees is available electronically, and has been since 2006, but Amazon still hasn't listed the Kindle version, so I have to have a link on my webpage sending people to my publisher’s website for the mobi version for Kindle users. Nook users have no problem.), I’m aware that there might be some glitches here and there. Also, as a member of EPIC, an organization of electronically published authors, I know several authors who only have their books available in electronic format, which are often ignored by the usual methods of book announcements. Fortunately, I can get news of new releases through EPIC’s newsgroups, but I do wonder how others find out about new releases.
I will occasionally go to the Amazon Kindle store and look up favorite authors that I know only publish electronically, but that's only when I remember to or when I notice my Kindle is low on new things to read. I miss Fictionwise and the alerts I had set up there.
I do attend several conventions as an author and get to meet new authors. And there are several bookdealers I can count on to carry titles that will interest me (and they will carry my books on consignment at the convention, so it's win-win for both of us).
So, where do you find out about upcoming and newly released books?