I’ve been re-reading the Scott Pilgrim comics lately (fans of the series will know why), and that’s a prime example of very smart literature about a very dumb person. Much as I love the protagonist, he definitely provides a glimpse into the world of thoughtless and selfish people, and it works so well.
My mum just told me earlier today that she’ll never get why I spend money on books that I’ve already read. For me, it’s a matter of self-expression, because my shelf says something about who I am - to guests, and to myself.
But it’s not even just that. They’re also souvenirs. If I’ve enjoyed my time in that world, with those characters, I don’t want to part with it. The physical book is a token of the time I spent and the adventures I had inside it.