I am a professional car photographer and actually bought this book when I was starting out in this segment to get some background information and insights in the world of car photography, and I am really sad to say this book is 'old' by now, it hardly speaks about digital photogaphy at all, and all the techniques and explanations are based on using film cameras.
Naturally the technique remains the same, hence I rated it a four as it really is a nice book to get ideas from, but these days things have evolved a lot further and I feel it is time to have a reworked, re-print of this one, that focuses better on handling digital files and possibly the post-processing, things that have become extremely important in today's day and age.
I would still recommend it to anybody that is interested in shooting cars, the basics remain the same no matter what camera you are using.