On the plus side, there's a good deal of great content and advice in here, covering the key aspects of kart racing. It's also written in a very straightforward manner, and contains almost no technical content so beginners won't feel intimidated. This is, as the title says, a book focused solely on the driving aspects.
Less impressive, however, is the fact that not many images are used (and there's even fewer diagrams), and they're all in black and white.
It's also rather short (you don't get a tremendous amount of words per page), meaning some areas aren't covered in perhaps as great a detail as you might like/expect.
As such, I wouldn't recommend it as a primary book on karting - there are more comprehensive and better detailed/illustrated books available. But as an additional purchase (particularly at the price) to accompany one of those more substantial publications, it's certainly worth a read.