In his previous book, Being Upright: Zen Meditation and the Bodhisattva Precepts, Reb Anderson Roshi described how we must become thoroughly grounded in conventional truth through the practice of compassion before we can receive the teachings of the ultimate truth. In The Third Turning of the Wheel, he introduces us to the next stage of our journey by invoking the wisdom of the Samdhinirmocana Sutra.
Amazon: https://www.amazon.com/Third-Turning-Wheel-Wisdom-Samdhinirmocana/dp/193048531X