It's just a thought I've had as books usually take a long time to read and often you are never going to reread the them. I'm currently reading "The Illuminatus! Trilogy" which is a grammatically odd title and at 800 pages I don't think I will reread it. The experience of reading it is enjoyable (for me) but would not be to everyone's taste, but it is a book I will never forget although I cannot remember everything about it because it does not have a storyline as such, things just happen. Also because it's such a big book it will make way for other books.
It can go to a friend or acquaintance who may want to try it or to a charity shop, it's irrelevant to me as long as someone else gets the chance to experience and enjoy it.
Certain books like "Imajica" by Clive Barker (my favourite ever book read two or three times and about a thousand pages) and "Lord of The Rings" will certainly never go but others always might.
Some books stay because you can dip in and out of them and find enjoyment that way, and others are reference books and great for researching things, but some have, by their nature, to have a limited home shelf life.
Actually the shorter the book is, the less likely it is to go because a 200 page book is a lot easier to reread that an 800 page book, also stories are usually better to revisit than biographies and factual books.
Music wise CDs are is some ways dead in the water for me unless they are in a special package and I have a few of those, but this weekend I have sold four on Discogs for a combined amount of £50 so some people are still interested in the format.
So what should I leave you with. I couldn't think of a song but here's a short video of some amazing libraries. Remember not everyone can afford books, but libraries give everyone the opportunity to enjoy books.