While child development books might provide some insight into how your child is doing, and certainly some of the physical milestones are pretty well mapped against a bell curve, you shouldn't rely on them. Normal child development is so individual, and as far as I know they have yet to really pin down a true chart of what happens when.
Mostly it is educated guesses, and some of the science used in those books is decades old and has been disproved. Definitely research a lot if you are worried, or if nothing seems amiss with your child, stop worrying altogether. There's no point in tracking every single change and comparing it to other children. Your baby will grow up at his or her own pace.