I've seen a couple of release dates lately that caught my interest.
Nation, the upcoming young adult book by Terry Pratchett, is scheduled for release on September 30 of this year. This is not a book in the Discworld universe but is a book he has had in mind for a few years and finally decided to write. It is available for preorder on Amazon.
There is an announcement on George R. R. Martin's news page that the next "Wild Cards" book, Busted Flush, will be available in this December. It can also be preordered from Amazon.