This answer is close (although I think you intended your first N to be an S), but the problem is that it means:
Originally Posted by Alterah
Some mysteries are better than all spy novels, and some mysteries are better than all nonfiction books.and these might not be the same mysteries. Whereas the original statement means that the same mysteries are better than both of the other types of book.
So you just need to combine these into a single expression, something like:
PS See my amended version in posting #7