Mr. Yates has written a number of mechanical and scientific how-to books, and in collaboration with Mr. Brock here presents quite a comprehensive survey of hotrods-their ilk and their realms of operation. Included in the material- all of which tends to stress safety and consideration for the other fellow- are chapters on the history of the National Hot Rod Association, the elements of ""souping up"" an engine inexpensively, good fuels, drag strip rules and operation. On the sport car, side, there is a definition of what a sport car is , and a colorful picture of European racing techniques. A glossary, car classifications etc., wind up the tally in a book that will have its steady market.