There may not be enough exclamation points or groans, depending on your fan status for "Cuff Me: TheFiftyShadesofGrey (Unauthorized) Musical Parody, " one of a few stage spoofs to take on the naughty books in song, and the first to hit New York.
The figures show impressive increases across the board in a year where e-book popularity - in particular the likes ofFiftyShadesofGrey - hit the headlines for racking up massive sales.