From Wikipedia:

Eckhart Tolle (/ˈɛkɑːrt ˈtɒlə/ EK-art TOL-əGerman pronunciation: [ˈɛkhaʁt ˈtɔlə], born Ulrich Leonard Tölle, February 16, 1948) is a spiritual teacher. He is a German-born resident of Canada[1][2] best known as the author of The Power of Now and A New Earth: Awakening to Your Life’s Purpose. In 2008, The New York Times called Tolle “the most popular spiritual author in the United States”.[3] In 2011, he was listed by Watkins Review as the most spiritually influential person in the world.[4] Tolle is not identified with any particular religion, but he has been influenced by a wide range of spiritual works.[5]

Tolle said he was depressed for much of his life until age 29, when he underwent an “inner transformation”. He then spent several years wandering “in a state of deep bliss” before becoming a spiritual teacher. He moved to Vancouver, British Columbia in 1995[6] and currently divides his time between Canada and California. He began writing his first book, The Power of Now, in 1997[7] and it reached The New York Times Best Seller list in 2000.[8]

The Power of Now and A New Earth sold an estimated three million and five million copies respectively in North America by 2009.[9] In 2008, approximately 35 million people participated in a series of 10 live webinars with Tolle and television talk show host Oprah Winfrey.[9] In 2016, Tolle was named in Oprah’s SuperSoul 100 list of visionaries and influential leaders.[10]