I've been dusting off a lapsed lifelong professional interest in RF, network technologies and related areas recently, and as part of that research I stumbled across this excellent book. If you've dug around the field at all you probably have realized that there are two large categories of books on RF and communications. The first is the very superficial, utterly non-technical book that will let you pick the topic out of a line up but not really understand it. The second large category is the college textbook written for electrical engineers, which is full of Grrek letter -laden formulae and is incredibly technical. Both serve their purposes to be sure, but are not universally relevant or accessible.
Sinclair's book starts off at a very, very basic level and uses plain, conversational language to explain RF theory from the ground up. It really is a fantastic resource that I keep going back to for fundamental points in a readily comprehensible format. I recommend this book professionally to a lot of people who lack a decent grasp of the basics, and without exception they are up to speed in very short order once this book arrives.
Well written, organized and very sound. Can't recommend this book highly enough.