If I had known nothing about chassis design and this was the first book I had read, then I would say that this rates rather well and would be more than adequate for a starting point. Having read several books pertaining to suspension geometries, chassis design and construction, composite application and driveline integration in modern race cars, I find it lacking in detail sufficient to actually build a car.
In reality, the detail needed to actually design and build a chassis for a specific car would require much more detail than this book provides. Stress analysis by suspension components and downforce, tubing diameter and wall thickness considerations, material types and their correct application, heat treating requirements after welding, welding methods for specific materials, jig construction, body attachment to frame, safety cage construction considerations, component mounting, mockup materials and proper "scaling" of strength and torsional rigidity ratings and many other aspects of chassis construction are not adequately discussed in this book for the designer / builder to make educated decisions prior to putting "rubber on the road".
The author hints at many of these and actually briefly discusses some of them, BUT I would not feel safe designing a chassis based on that information alone. Again, great for the beginner as "an overview". Should also recommend other follow-on readings at the end with a synopsis of the strengths of the recommendations.