It's called Love you forever by Robert Munsch and it's a Canadian classic.
It's a great book. I can't read it without falling apart and crying like a baby.
Should I hide it? Give it away? Just leave it on the shelf until ds can read it for himself... I think that might actually be worse - listening to him read it I may end up face down in a tissue box surrounded by biscuits and choccy wrappers.