Paul B. Baltes & John R. Nesselroade 
Life-span Developmental Psychology [PDF ebook] 
Introduction To Research Methods

What are the changes we see over the life-span? How can we explain them? And how do we account for individual differences? This volume continues to examine these questions and to report advances in empirical research within life-span development increasing its interdisciplinary nature. The relationships between individual development, social context, and historical change are salient issues discussed in this volume, as are nonnormative and atypical events contributing to life-span change.