Slowly emptying a bookshelf over at dad's place every week and sorting them out at my place to see if they're of any value and if not I can donate them to the thrift store. 99,99% of those books aren't really valuable, it's amazing how many you can find for 1 euro over at Vinted. There's a lot of books, 8 bookcases full... the thrift stores are going to be very happy.
Sometimes I glance at the first few pages of a book if the theme seems somewhat interesting enough. And if one makes me smile or snigger, maybe I should keep that book a little bit longer in my possession until I'm sure on whether I'm really going to read them or not.
That first scene in Captain's Corelli's Mandoline was so absurd enough that I won't get rid of that one quite yet. I actually kinda want to know how that ends. Just don't know when I'll actually go read it, I need to get rid of the nicotine smell first, ugh.
Plenty of old books too without ISBN. Those are annoying to check up.