This is a useful book that can be recommended to practicing psychologists, teachers of psychology and students. It is useful because it reminds us of the importance of paying attention to sound theoretical contexts and research before we plan interventions for individuals or larger groups. It demonstrates how much more sophisticated models of longitudinal research, and hence monitoring our own work, have become. It reformulates the old nature-nurture debate by illustrating the complex interactions between DNA, individual characteristics, psycho-social transactions and significant life changes. Finally, it is a pleasure to read yet more of their work, which presents well thought-out psychology in easily accessible language.