In the judgement of children’s books…for is often the key word. Books are not just ‘good’ but ‘good for‘. Books are used for different purposes at different times — for more things than most books are. Some are ‘good’ time-fillers; others ‘good’ for acquiring literacy; others ‘good’ for expanding the imagination or ‘good’ for inculcating general (or specific) social attitudes, or ‘good’ for dealing with issues or coping with problems, or ‘good’ for reading in that ‘literary’ way which is a small part of adult culture, or ‘good’ for dealing with racism… and most books do several of these things.
– Peter Hunt