Ch. 1. Characteristics of unipolar depressions -- Ch. 2. Intergenerational transmission of affective and cognitive processes associated with depression: infancy and the pre-school years -- Ch. 3. Unipolar depression -- a lifespan perspective: 'The school age child' -- Ch. 4. Adolescence -- Ch. 5. Early adult life -- Ch. 6. Depression in midlife -- Ch. 7. Later life -- Ch. 8. Unipolar depression across the lifespan: issues and prospects.