When the young Swan Dan Hannebery seemed anxious, Kirk recommended that he do some meditation and read The Power of Now and A New Earth by Eckhart Tolle.
Castielle does not belong to any religion but she is inspired by Eckhart Tolle and Jiddu Krishnamurti.
It has published a number of bestselling titles, including The Power of Now by Eckhart Tolle (a New York Times bestseller for 100 weeks), The Seven Spiritual Laws of Success by Deepak Chopra, Way of the Peaceful Warrior by Dan Millman (through its H J Kramer imprint) and the Collected Works of Joseph Campbell series, including the acclaimed 2008 edition of Campbell's classic The Hero with a Thousand Faces.