What is the author's style in The Diving Bell and the Butterfly by Jean-Dominique Bauby?

The reader experiences events as Jean does, with the exception that the reader does not sense that he is laying in bed alongside Jean. The reader understands that Jean is stuck inside a diving bell, but Jean allows the reader to fly with the butterfly of his mind. Jean has an amazing ability to relax the reader, provide accurate descriptions of his locked-in life, and still feel as if Jean is a walking, talking person sitting down for a cup of coffee.