"Consciousness Altering"
This book caused me to realize how much my mind (ego) is generally in control of me. I had studied a number of meditative teachings, and already had the ideas in my head, but it was this book that catalyzed a clear transformation in me. There were moments where Tolle's voice (as the narrator) caused me to observe my own presence. My mind wrestled with the book, and at several points it wanted to toss the book aside, dismissing it as new-age spiritual hoo-ha (and there may be points where you try to dismiss it this way, also). But in retrospect, as I live my life, it is impossible to ignore the essential truth that Tolle has put words to. Slowly, the moments are increasing where I feel liberated from my mind's patterns of control and obsession with past/future. This was one of the most powerful books I have encountered.