Now I'll be fair, yeah, the price increase from 7th ed books to 8th ed books seem quite steep, as evidenced above by Norton.
Was the book before that also €18? What was the cost of the previous book in 2001?
A hardback book seems to be about what? Between €4 to €8 more than a paperback version? The €26 to €33 isn't dramatically huge given trends in books.
I'm not particularly defending Games Workshop. I'd love if they made things cheaper. I'm more trying to play devil's advocate.