> Read books are far less valuable than unread ones.

izzit me or is that total garbage? The only information of value is that which you can use, if it's in a book you've never read it's effectively nonexistent. I get text books to stuff them into my cranium, not have them sit around as handy doorstops.

Might as well leave them in the bookshop until you need them. They're just as unread and you have cash in your pocket for other things you actually need.