This book presents an overview of the methods and results of laboratory dream research: the collection of dreams under various conditions; different methods of dream evaluation; physiological and psychological factors of dream recall; memory sources of dreams; and dreams in different sleep stages. The main focus is to describe the phenomenology of dreams. What are the common features of dreaming with regard to images, thoughts, and emotions? Where does the dream take place and who enters the dream "theatre"? In what kinds of scenarios do dreamers find themselves? The authors' evidence is based on dreams collected in their sleep laboratory. Results of analysis of 500 REM dreams are discussed with reference to sex differences, children's dreams, and waking fantasies.