Pennebaker has written or co-written a huge amount on this subject; the best summaries of his work, and related research, are ‘Expressive Writing in Psychological Science’, Perspectives on Psychological Science (2018): and, with Cindy K. Chung, ‘Expressive Writing, Emotional Upheavals, and Health’, in H. S. Friedman and R. C. Silver (eds), Foundations of Health Psychology (Oxford, 2007).
