Eckhart Tolle's, The Power of Now, a guide to spiritual enlightenment is available as public domain here.
"Eckhart Tolle is emerging as one of today's most inspiring teachers. In The Power of Now, already a word-of-mouth bestseller in Canada, the author describes his transition from despair to self-realization soon after his 29th birthday. Tolle took another ten years to understand this transformation, during which time he evolved a philosophy that has parallels in Buddhism, relaxation techniques, and meditation theory but is also eminently practical. In The Power of Now he shows readers how to recognize themselves as the creators of their own pain, and how to have a pain-free existence by living fully in the present. Accessing the deepest self, the true self, can be learned, he says, by freeing ourselves from the conflicting, unreasonable demands of the mind and living present, fully, and intensely, in the Now". Review link.