Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don Piper's 90 Minutes in Heaven

I truly believe Don Piper's story about his accident and death and his 90 minutes in Heaven and his return to earth through the prayer of the pastor that prayed continually and sang hymns until Don started singing along with him. There were a great many prayers from fellow church member, family and friends. I bought several of these books and gave them to my children, my friend that just lost his wife and another friend that just lost her son. It brought great hope and peace to these friends.