Books are a great source of racing information, but when it comes to driving instruction, nothing beats actually being in the car with an instructor. Going Faster! gives you that experience and more, all from the comfort of your living room sofa.
Whether you are first learning about racing, or you are an experienced racer looking for a refresher course, this video has great information and vivid illustrations of important concepts. Worth the price just for the Lime Rock course notes, but the highlight has got to be riding with one of the Skip Barber instructors as he works his way up through a Formula Ford field -- while narrating the entire race!* 90 minutes, NTSC Region 1 (USA) DVD.
* Seriously -- Skip drives a few laps with a voice-over critique he recorded later, but Carl Lopez actually gives running commentary during the race, from his start at the back of the grid until he takes the lead.