The Divine Series was written as a single arc told through three doorways. Each book stands alone, but together they trace a path from the first quiet question (who am I, really?) through the loosening of old beliefs to the final homecoming, the recognition of what was here all along.
If you are brand new to this work and want the gentlest possible on-ramp, begin with Behind the Curtain · a shorter gateway book that introduces the core ideas (the Trinity of Truth, the observer, karma, the natural state) before the series explores them in depth. Then read the series in order, beginning with Book I, which builds the foundation the other two rest on. Each book can stand on its own, so if you already know this territory and a different title is calling to you, trust that.