I don't know yet. The amazing people who did the covers for the first books are working on it now. As soon as I get it (and get the okay to post it) I will.
WHY WON'T YOU POST A SUMMARY OF GG3?
This is my personal bias, I guess. When I pick up a book in a series that I love I like to have ZERO spoilers--not any. Not even a little bit. And the little summaries that go on the backs of the books do contain mild spoilers. So I'm choosing not to post it here.