Ros Barber's Shakespeare: The Evidence --The Authorship Question Clarified will be published Nov. 24, 2013. Info at https://leanpub.com/shakespeare. Video promo for the book (above) is available on YouTube at Shakespeare: The Evidence.
Promo material on the publisher's page says:
Whether you are a firm believer that Shakespeare wrote Shakespeare, or suspect that he didn't, this book aims to enable readers to gain a more comprehensive knowledge of the problems at hand, clarify their thinking, and identify weaknesses in, and logical rebuttals to, the arguments of their opponents, as well as potentially strengthening their own.Ros Barber, PhD is the author of The Marlowe Papers (St. Martin's Press, 2013) that won the Hoffman Prize in manuscript in 2011.
UPDATE 11/17/13: A note published today by Ros Barber at http://rosbarber.com/shakespeare-evidence/ says the first installment of the Shakespeare: The Evidence ebook will be published on November 26, 2013.
UPDATE 11/19/13: Read Ros Barber interview "Ros Barber publishes the evidence" on Shakespeare Oxford Fellowship news page at