Psychology of senescence, Ursula Lehr, is a classic study on aging of this volume is a completely renovated and enlarged edition. The book delves into the psychological, but biological and social factors that influence the aging process and offers an illuminating summary of the results of major research on aging carried out so far. The authors founded and developed the proposal, advanced in previous years, to carry out a differential gerontology note that there are many different ways of aging, which are influenced by both external and internal factors ranging from health or style of life to the stimuli and challenges that each person receives from its environment. Individual projects of life, from childhood and youth, through the various stages of adulthood, are shaping the late stage of life, giving narrowness or breadth, depth or shallowness, more or less content and color.