Here are 2 books we would recommend to everyone! A New Earth and The Power of Now, both by Eckhart Tolle.
“Time isn’t precious at all, because it is an illusion. What you perceive as precious is not time but the one point that is out of time: the Now. That is precious indeed. The more you are focused on time—past and future—the more you miss the Now, the most precious thing there is.” The Power of Now