I have today bought a copy of the Observers Book of Soccer 1980, but the hard cover with the picture of Kevin Keegan is one way up, and the entire contents of the book are upside down. Would this be of any interest to a collector?
I can't imagine that any type of book collector or football fan would pay over the odds just because of the upside down cover (or rest of book - depending how you look at it).
The book is simply an example of poor workmanship. In my working life as a bookbinder, I saw some books that were 'cased in upside down', as they were called, and they were rejected before they even left the factory. It's not worth a bean.