I had a fun two days this week rearranging ALL our books, culling out some, and counting them.
I didn't intend to do this. I had walked to the big bookcase in the library looking for a particular book and noticed that the shelves were looking messy and that a lot of books weren't in their proper categories making finding them difficult.
When you have as many books as we have, you have to categorize them or you'll never find anything! I arranged them by the Dewey Decimal System several years ago.