I recently bought this book after I borrowed it from my local library. I tried to find it a second time, and it's always checked-out in all four branches of our library system. The call number is 004.678 OHR. Out of all the 802.11 books, this is one that is the most packed with the real information you need to install an 802.11 network - antenna theory, how to do site surveys, how networks connect together, how to do an as-built. The book also describes how to debunk and overcome the perceived barriers that keep people from using wireless - security, interference, regulatory issues... If I was to recommend one single book on 802.11 to anyone, this would be the one. It definitely earns its five stars.