This is a good book for an intermediate or advanced radio hobbiest. I thoroughly enjoyed the parts about the history of various aspects of radio equipment and I found many useful design and construction tips. The circuits described can be used in your own radio projects, or just to give insight into doing your own designs. The author touches on just about every area that a ham radio enthusiast needs for homebrewing equipment. The book is also good for someone just interested in radio hardware, such as restoring old equipment. Included is theory about many aspects of electronic design related to radio, in sufficient depth to add to your understanding of electronics in general.