I found this volume in the Mysteries series to be much more readable and informative than the last few I have read. I think it’s because the stupid paranormal aspects of dreaming are limited to the final chapter. The bulk of the book is a more down-to-earth analysis of the cultural importance of dreaming along with the psychological and scientific aspects of sleep and dreams. Even the paranormal chapter is approached from a pseudo scientific angle. The “experiments” include having a Grateful Dead concert crowd sending psychic messages to dreamers. No exactly a rigorously-controlled scientific study.