books.google.com - What, if anything, do dreams tell us about ourselves? What is the relationship between types of sleep and types of dreams? Does dreaming serve any purpose? Or are dreams simply meaningless mental noise--"unmusical fingers wandering over the piano keys"? With expertise in philosophy, psychology, and neuroscience,...http://books.google.com/books/about/Dreaming_Souls_Sleep_Dreams_and_the_Evol.html?id=uJRi3cpb4iYC&utm_source=gb-gplus-shareDreaming Souls : Sleep, Dreams and the Evolution of the Conscious Mind