This is a collection of essays, which may account for the unevenness of the style and emphasis. The book provides a great deal of information on the 1921-1929 surge; every factor that fed the boom and brought on the bust would appear to be here. Low wages with high productivity, weak unions, pro-business government, surging consumer credit, stock manipulation by insiders. Insull with utilities, the Van Sweringens with rails, Kreuger with matches they're all here. Bad forces and worse men. The country was set for an economic eruption in 1920 with thirteen bathtubs and six phones per 100 families, but greed, venality and stupidity let it run away. . . . Why Sobel defines dividends and leaves more complicated and important matters unexplained is puzzling. The book may serve to enlighten and to ward against a reoccurrence, but it's no red flag.