There are many better books out there covering pregnancy in a lot more detail (check out the Page-a-Day book from DK Publishing). Also as a warning to other fathers to be... I would strongly advise avoiding the week 6 chapter in this book. Whereas the rest of the book is positive informative advice on what is happening that week, week 6 focusses almost entirely on miscarriage at a time when you're partner is worried anyway and needing support and reassurance.
If they removed the week 6 chapter of DOOM to an appendix or separate section I'd give this review 2 stars as it's the worst of 4 books we've bought (and is gathering dust whilst the others get looked at near-daily). With all that bad news where it is, I'd give it 1 or less. Your money is better spent elsewhere