Rick Warren’s “The Purpose-Driven Life: What on Earth Am I Here For?” sold 11.3 million copies in 2003, making it one of the biggest best-sellers of all timke. “Unabashedly religious, the book is being read and studied by millions of people in and out of churches across the country. Readers are buying extra copies at churches and in bookstores and passing them along to friends. As a crossover bestseller, flying off the shelves in both the Christian and mainstream markets, it is a modern marketing miracle.”