Per Sam's "Waking Up" website:

Sam Harris is the author of five New York Times best sellers, including Waking Up: A Guide to Spirituality Without Religion. His writing and public lectures cover a wide range of topics — neuroscience, meditation, moral philosophy, religion, rationality — but generally focus on how a growing understanding of ourselves and the world is changing our sense of how we should live.

Sam received a degree in philosophy from Stanford University and a Ph.D. in neuroscience from UCLA. He has practiced meditation for over 30 years and has studied with many Tibetan, Indian, Burmese, and Western meditation teachers, both in the United States and abroad.

Author of the Waking Up book, and the Waking Up app.

• What's the difference between the "Waking Up" book and app?

Also the author of many, many other books, public figure in the podcast space and conductor of many public debates/lectures.