•"The Power of Now: A Guide to Spiritual Enlightenment" by Eckhart Tolle is a spiritual guidebook that encourages readers to live in the present moment and transcend the obstacles of the mind. Tolle argues that constant worrying about the future or dwelling on the past disrupts mental peace. The book's teachings and practices, such as mindfulness and meditation, help individuals live in the now, achieve inner peace, and attain spiritual enlightenment.