I read today in the Christian Science Monitor that Ursula LeGuin has a new book out. It's titled Lavinia, for the bride of Aeneas (Harcourt, ISBN 978-0151014248). It is her story, rather than the story of the traditional hero. It clearly would qualify for the Once Upon A Time Challenge, if you are looking for an entry in the category of mythology.
I may have to go out and buy this one immediately. I so admire LeGuin's work. In my opinion, she is never dull and her perception of human behaviors are generally on-point.