The first two sections of the book contain a historical explanation of the context in which Genesis 1 and Genesis 2-3 were written, thus explaining the discrepancies between the chapters and why they exist.
Textual criticism is a field that greatly intrigues me, and any historical context given to the Bible is something that I will eagerly eat up. From that viewpoint, then, this book was extremely fascinating. The last two sections (placing the interpretation of Genesis 1, 2-3 into a modern context and questions that arise from it) were a bit boring, but the first few sections more than made up for that.
The book is a quick read and an insightful one that presumes the Bible to be a human and changing text and one that can be more fully appreciated in light of a contextual understanding. So, all in all, quite a good read.