Scifi, fantasy, mythology, art and history makes up the majority of it. Maybe a few hundred these days.

A while back I made the decision to read everything I'd only read once on paperback. And everything I re-read periodically I collect in very nice cloth or leather bound editions. Stuff like this. I'd just started packing the 'library' here.

I got four doors worth of shelves like that and any time it's full, I take a look at what I'll get rid of to make space for something new. Usually it's the art books that get it as they're the least read and most replaceable. With some exceptions.