I used to keep all of the books that I ever bought, which was a lot of books, I was on par with the library, if anyone was going on holiday and wanted a book they could look through my collection. I bit the bullet at the end of last year and sent them all to good homes, ie friends or charity. I realised that I was not reading most of them again so why keep them. I do have favourite authors so I have kept those books. It was very sad but had to be done.