I've done AutoX and road racing for some years and recently started as an instructor for racing drivers license courses. I have bought and read about ten books on motor racing technique. This one, written by Ross Bentley, was one of the best. Where Skip Barbers (although excellent) book is very theoretic and quite technical in it's approach, with diagrams and figures, Ross Bentley writes modestly and concisely about the "softer" sides of racing, for example about mental training, feeling the car and how drivers psychology works.
Many of the secrets are blatantly obvious when you see them in print and read his motivations, but to race successfully you need to remind yourself all the time. This book is perfect for that. The suggestions on how to hone your race driving skills in your everyday street car (without ever violating traffic laws i must add) is worth the price of the book alone. If you must buy only two books on racing, combine Ross Betleys Speed Secrets with Barbers book and you get most of the picture. Highly recommended!