Explains current views on the possibility of time travel in a conversational tone. Part I offers a nontechnical account of some of the major current theories concerned with time travel and with the quantum mind. Many of these theories are controversial in the scientific community. Part II leads readers on several trial-run trips in time with great writers and filmmakers as guides. Works discussed include Doctor Zhivago, Back to the Future, and Faust. Annotation c. by Book News, Inc., Portland, Or.