Here's why:
* Non-fiction: The book is based on a true story, recounting the author's experience of a near-death experience and his subsequent recovery.
* Religious nonfiction: The experience described heavily focuses on spiritual themes, including the afterlife, the nature of God, and the author's faith.
* Christian literature: The book's perspective and interpretations are firmly rooted in Christian beliefs, making it resonate with readers seeking spiritual guidance within the Christian faith.
While some aspects of the book may be seen as biographical or inspirational, its core focus on the author's spiritual journey and the theological interpretations of his experience solidify its classification as religious nonfiction.