Henry Rex Greene grew up in the San Gabriel and San Fernando Valleys of Southern California. The semi-retired physician specializes in hematology, oncology, and hospice/palliative care. He has had "strong involvement in shaping the hospice movement and medical ethics." Dr. Greene is the author of numerous books, and resides with his wife in Henderson, Nevada. He credits his far-flung interests to great teachers who knew how to nurture their students.