In the past 8 years that I've been working as an electrical engineer I've read dozens of books on microwave/antenna theory & design. I can confidently say that Eric Holzman's book is unique in its kind. Most young engineers, including myself, cannot even realize that their systems might suffer from RF grounding problems, until something goes very wrong. This book is a much-needed "rude awakening" into real-life microwave design problems, and deserves to find its own vital space in microwave literature.
The book essentially begins with Chapter 2, where the author attempts a nice parallelism between electrostatics and electromagnetics as a way to define the notion of "RF ground".
The core of the book comprises Chapters 3 and 4. The practical information given on proper grounding of TL's and how to make the transition between TL's is indispensable. Some nice references can be found there, too.
Chapters 5 and 6 are much more focused. Ch. 5 will benefit the amplifier designer, while Ch. 6 tries to convince the antenna designer that sometimes the ground plane is more important than the radiating element itself. Both chapters could have been much larger in extent, with many more practical examples. Unfortunately, the author and publisher decided to keep them at about 40 pages each. Nonetheless, their worth is inversely proportional to their extent.
To sum it all up, the book is worth every penny. It's a definite must for engineers who have delved into RF/MW theory but not so much into hardware and its intricacies.