"What on Earth Am I Here For?" is the subtitle of the book "The Purpose Driven Life" written by Rick Warren and published by Zondervan. It has sold over 32 million copies, as of 2014, and comes after the Bible as the most translated book in the world.
"The Purpose Driven Life" is a 40-day devotional and self-help book that takes readers on a spiritual journey. In this book, Warren uses biblical stories to present what he says are God's purposes for human life on Earth. The book has been named the bestselling non-fiction hardback book in history by Publisher's Weekly and is the most influential book for pastors and ministers, according to a study conducted in May 2005.