The books in this series are, by far, the best books on high-performance driving I've ever read.
The lead author is an accomplished driver, and his understanding of the physics of driving goes well beyond what you'll find in other books. I myself have substantial track experience, with good results as an instructor and advanced coach, and I'm also an engineer with a good physics background, and yet I've learned A LOT from these books.
Aspects of driving which may have been vague and murky previously can become very clear after you read these books, but be advised that this isn't light reading. You'll need to put your thinking cap on and really concentrate, though the effort will be worth it if you're a serious student of driving or a racer who's motivated to win.
The first book in the series presents the basic concepts, and explains how they apply to various types of corners. This second book builds on the first one and takes things to a higher level, in the process answering many of the questions the first book may have raised for you. I could elaborate further, but you really need to read these books yourself to appreciate what they have to offer.
Simply put, I can't recommend these books more highly!