I bought some books from Amazon - spent £30. First time I've bought books for a few months. I love books. DH is an alcoholic and spends £40 a week (at least) on alcohol. I don't drink.
He thinks I've 'wasted' money buying books he doesn't approve of (he hates almost all books, especially ones that give advice on child rearing - one of my books was the mumsnet guide to toddlers)
I think it doesn't make any difference what he thinks of the books, I bought them for myself.
This whole issue is so much more complicated than that - but I don't have time to post in full.