I received a e-mail promoting this book, and I'm farily skeptical. Then again, there are some big names offering commentary on it. Ian McKellan's blurb, though it tends to damn with faint praise (or to praise with faint damns), does call it "original":
All the same, I'm willing to give it a try. I'll let you know what I think.I couldn’t quite believe All the World’s A Grave: such an original idea. The verbal parallels it plays with are intriguing and certainly have merit in pointing out that Shakespeare did repeat situations and ideas throughout his plays.
Links: The book's website.