New Robert Heinlein
It's not often you can say that a new book by a dead science fiction writer contains quality material that has never been printed before. There is a collection of scripts he wrote in the 1950's that is being released by Subterranean Press. It's called Project Moonbase and Others. Pretty neat, I think. The collection is a little pricey but I own pretty much everything he's ever released, admittedly much of it in paperback, so I may have to consider purchasing this.
If you are interested there is a script available for free at the Subterranean site. You can view it here.