Start with the obvious: the ones bought for a course, the ones with a cracked spine and no sentimental claim, the duplicates that arrived as gifts. Box them, put the boxes out of sight for a month, and see what gets remembered.

Then the harder pass. A book you keep because you might be the sort of person who has read it is not a book you own, it is a costume. Keep the ones you have actually returned to, lent and wanted back, or written in.

Sell what has value, donate what hasn't, and keep the local shop in the loop: a good second-hand buyer will tell you which of your discards are worth a tenner. Poker ID login takes boxes by appointment and prices honestly, which is more than the online trade will do for you.

What remains should fit with room to grow. Leave one empty shelf as a rule; it disappears within a year, and the cull earns itself back.