I will start by telling you what this book is not. It is not a text-book describing how to implement agents in any particular language. Neither is it an 'Agents for Dummies' style book - the subject matter is not simple, and a simple book will not cover the design and implementation of agents well.
It is however an excellent text book on the theory of agents, agent systems, what exactly we can use them for. Plenty of example studies are given, showing how they can be used, and processes such as communication and awareness are covered thoroughly. The writing style is clear, and while some of it may need another read or two before matters sink in, it is explained well enough to make sense.
Consider this book a good volume on theory. Combine it with a book such as those by Wooldridge or Weiss, and you should be able to sit down and work through the design and construction of a multiagent system with ease - assuming your programming is up to scratch....
Overall, an excellent little volume. A bit of thought is needed to get the most out of it, but time invested in reading it is time well spent.