This is essentially a text for those involved in research into normal and abnormal motor development in children; in fact it must be considered indispensable to them. The reason for this: a number of leaders in their field give an up-to-date review of the progress made in various aspects of their work, and in a form that would not be available elsewhere. But what of the average reader of this journal? For them it is likely to be used as a reference book when particular …