David Kessler is an author, public speaker, and death and grieving expert. He has published many books, including two co-written with the psychiatrist Elisabeth Kübler-Ross: Life Lessons: Two Experts on Death and Dying Teach Us About the Mysteries of Life and Living, and On Grief & Grieving: Finding the Meaning of Grief Through the Five Stages of Grief. His first book, The Needs of the Dying, received praise from Mother Teresa and Marianne Williamson.