This is a new edition of a book last published in the early 1970s. It has been completely rewritten, making it shorter and simpler with many more illustrations. It is aimed at parents rather than professionals.
I can not say I found it all awfully relevant but there was a few interesting insights. In particular, I realised that some of the things my little one does, that I would on occassion find quite annoying, are actually an important part of her development and growing up. Stopped being frustrated and am simply grateful now