Bookshelves accumulate all sorts of clutter. Leaflets, pamphlets, flyers and books.
Looking at my bookshelves was starting to get depressing. So many books I have not touched in years. So I decided to donate to my local Oxfam book shop.
That is, of course, assuming they are sellable. Some were quite expensive like Operating System Concepts by Silberschatz and Galvin. I bought that ten years ago when I was a software engineer and had to know those things. Now I'm a DBA operating system fundamentals aren't as important as they used to be.
Carrier bags of heavy computer books are waiting by the front door for me to take to work tomorrow. From work I will lug them to my local Oxfam.
Free shelf space. A void. To fill.