With dd1 and dd2, I was very precious about books - we only really looked at them together and they were never allowed to bend the pages/screw them up/tear them. They have grown up to be fairly careful of their books and, seeing how some of their contemporaries treated their school reading books when they started school , I felt I had done the right thing.
But when I had ds, I wasn't so sure - so I have let him have a few hardback books in his toybox. Well, they have been sytematically shredded, bent, chewed etc - about what I would expect really! He really enjoys them though and loves to turn the pages and point at the pictures. We read together too and it is a bit of an issue then as he is used to being very "hands on" and, erm, destructive.
So have I set myself down the slippery slope to producing a child who has no idea how to treat books with respect? Or, in the words of cod, "Miaou, you thinketh too much"