I also bought (not brought) this book as it was recommended reading for a 3rd year psychology module at university. I found it to be comprehensive, innovative and engaging. It's immensely well researched and lucidly written which makes it ideal for any student of developmental psychology, however I found it really set itself apart from more course-oriented textbooks in that it delivers a genuinely optimistic account of children's capacities.
The author has split the book into chapters which tackle different domains of children's knowledge including cosmology, biology and number, as well as developmental staples such as theory of mind. I feel that this is an ideal way to approach structuring as it allows the author to explore each topic in depth, allowing a proper examination of the wealth of empirical findings.
I also need to stress that the book does not solely address the acquisition of scientific knowledge in young children. The book instead takes a much broader approach to children's knowledge, addressing knowledge domains spanning from biology and cosmology to reality and language. The confusion of the other reviewer is perhaps because the book has topics such as cosmology, and there are discussions of developmental theories which offer explanations through analogy to scientific process. The book is very broad in its remit, though if I had to summarise what the book is about, it addresses how the true capacity of children is perhaps being overlooked due to how we go about assessing it.
I would say that this book is quite challenging, which explains why some people might be unable to distinguish between their own failure of understanding and the coherence of the author. However I think that a patient lay reader should not be put off, as the entertaining and enthusiastic style makes it thoroughly enjoyable to read. If you want a book that gives a fresh, informed and enlightening analysis of children's knowledge then I wholly recommend this!