This is a very cheap paperback that is easily worth ten times the other HUGE rather expensive hardbacks I have read regarding child development. I bought this (new) amongst other titles for a university course and this is without a doubt the only book I found remotely interesting or relevant. Donaldson's writing is concise and still very accurate, even now some thirty years later. I recommend this under-priced and under-rated paperback over anything else you may consider buying regarding child development/pyschology etc. This lady researched for Piaget and had great respect for him (very apparent throughout)yet she recognised, and indeed has written about some of the flaws in his methodology that he himself did not consider. Chomsky's theory of language development is also covered 'uniquely' in my opinion.
Fantastic read, an absolute must have if you're remotely interested in child development or Piaget himself.