I would correct it, combine it, and merge it. It looks like there's only one other entry out there, so it's easy to do. After you combine it, just delete this one. The reviews, etc., will be transferred to the entry with the ASIN and more complete information.
http://www.goodreads.com/book/edit/15... just need the title & author's name correcting & combining or is it more complicated than that?