Susan Moore and Doreen Rosenthal are both highly qualified developmental social psychology researchers and former university professors. They have each had over thirty years experience in translating the results of parenting and child development research into practical, readable, and entertaining guides. Their expertise covers adolescence, parenting, and retirement and how these changes offer both challenges and opportunities for growth and fulfilment. As mothers and grandmothers themselves, they understand the huge impact of raising children. They highlight the fact that each child is different and whatever his or her birth order, will add something unique and special to a family. Â