Luckily I started reading this book when my baby was only a few weeks old. As a new parent it covers all the basics I needed for reference. Also, I never would have thought of baby wearing, but now that she is two months old I have a sling and a wrap which give me a lot of freedom of movement both in the house and out, as well as the closeness with the baby. This book is obviously very comprehensive and I feel good that I have the developmental information for each month to refer to as well as what to do when she inevitably gets a cold --for example the section on when to call the doctor.