Night has fallen, sleep has beckoned, and one begins to walk the brilliant Virtual World of our dreams! But what really are our dreams? Why do we dream? How are dreams created? How does a dream relate to the Real World, and to our brain? Are dreams an illusion? At the forefront of the current debate on dreaming is the quest to crack the enigma of dream consciousness: to understand what dream consciousness is at its most fundamental level. Solving this mystery is considered the holy grail of dream theory, and is the central theme of this book.