A wide-ranging discussion of mankind's expansion of life into the wee hours of the night. The night owl has always been an outsider, a strange creature and an adventurer brave and desperate enough to explore a dimension others feared. Yet those who were awake when others slept have inhabitated a private world, one free of the normai constraints of the conventional 7 A.M. to Midnight crowd. The author compares these eccentrics to earlier hearty souls who settled the western frontier. As was the case then, the first intrepid explorers were eventually followed by more timid souls. So it has been with the exploration of the night. The author analyzes the invasion of the wee hours and points out problems and benefits, using the latest scientific findings to discuss sleep and work habits, the diurnal rhythms and the effects of light itself. He also speculates on what the future may be like. Will we even need to deep? Will there be substitutes available? How will this affect man and his myriad activities? An interesting survey of nocturnal life. A bit redundant, and perhaps it could all have been said in a magazine article. Still, an intriguing concept.