John Rateliff has a fascinating post on his blog about another new Tolkien book coming out in the next few months. This one is apparently a translation of the Book of Jonah. Probably it's not going to be of too much interest to the majority of Tolkien fans, but it looks interesting to me.
Also in the post he briefly discusses the book Sigurd and Gudrun, the new Tolkien book that came out at the end of last month.
(I just want to note that I'm half-way through Sigurd and Gudrun and enjoying it greatly)