Dr. Alexander falls into a coma after contracting a rare disease. He's in a coma for seven days and as his family and doctors discuss ending treatment, he regains consciousness. He writes very vividly about where he was for those seven days. Before this experience, he was not a believer in the soul, God, or heaven, but this experience changes him.
This was a strange read. He writes about the spiritual landscape he entered into, and it is just way beyond our human knowledge that it was challenging to understand and grasp exactly what he witnessed.
It reminds me of the end of C.S. Lewis' The Last Battle: "All their life in this world and all their adventures in Narnia had only been the cover and the title page: now at last they were beginning Chapter One of the Great Story, which no one on earth has read: which goes on for ever: in which every chapter is better than the one before."