I was just renewing some books online at Derbyshire libraries site. Instead of racing off the site like I normally do, I had a look around. Looking for events. What I found was something called Which Book that gave you suggestions under different categories. I put some categories in and then let it search. It was quite fun what it came up with. One of the guest lists was a librarian from East Dumbartonshire, so it's obviously a country wide system.