I've noticed that about that same book.. It does seem out of order in some spots.. Not that I'm an expert on writing textbooks, but there's so many places that say "(which you will learn about later, in Chapter 38)".. But it's working for me, my class is moving at a lightening pace, and I have at least one chapter to read everyday.
I do like the book because it's easy to write notes from. All the key terms in each chapter are laid out, important items are in bold and italics.
I also like the workbook that goes along with it, but I wish they concentrated more on Street Scene discussions and critical thinking exercises. It seems like those are valuable discussion points.