Books on cost of raising children

Does anyone have a referral for a reliable and readable book on the cost of raising children?

I think the costs would vary greatly depending on where you live and how you decide to raise the child. The cost of raising a child calculator (http://www.babycenter.com/costofchild/) may be of interest to you and give a basic estimate for you.
____________________
Financial Baby Steps (http://financialbabysteps.blogspot.com)