Sometimes, curling up with the right book about spiritual or religious topics is enough to start a spiritual renewal.

The Book Industry Study Group, a publishing industry trade association, says religious books accounted for $1.9 billion in sales in 2004. The group predicts a 50 percent increase in religious book sales in the next five years.

Amazon.com lists its most popular religious and spiritual books daily. Here are some of the best-sellers this week:

¢ “The Purpose-Driven Life: What on Earth Am I Here For?” by Rick Warren. The book, which is written for Christians, centers on the premise that God has devised a master plan for every human. It’s set up with 40 short chapters meant to be read over 40 days, giving advice for finding your purpose in life.

¢ “A New Earth: Awakening to Your Life’s Purpose,” by Eckhart Tolle. Tolle presents a dire picture of the state of humanity but offers hope that people have an opportunity to create a better world.

¢ “The Power of Now: A Guide to Spiritual Enlightenment,” by Eckhart Tolle. Tolle says living in the present is the truest path to happiness and enlightenment.

¢ “Ask and It is Given,” by Esther Hicks. This book is a series of spiritual messages Hicks says are channeled to her through spiritual entities. It focuses on how to fulfill desires.

¢ “The Four Agreements: A Practical Guide to Personal Freedom,” by Don Miguel Ruiz. A shamanic teacher and healer, Ruiz discusses the self-limiting beliefs and codes of conduct of his Toltec ancestors.