Although some would disagree, the stock market and the American economy hinge on his every sentence. His adjustment of prime rates can create jobs--or destroy them. A negative word here, a positive word there can cause wild gyrations in the market. This book provides an in-depth look at the public and private life of Alan Greenspan, chairman of the Federal Reserve Board. Annotated in November 1996 "Advance" under the title "Market Maker". Photos.