I just finished a graduate course using this book as the textbook. At first I thought "Hmmmph - another OSI Layer book." What I learned is that it is very current, going into Blue tooth, Internet II, and all the latest Wireless protocols, too. Like consider the multiple Gigabit networking architectures, including optical and copper. This is "one for the shelf" of every do it your selfer wanting to learn and it reads like a "how to" manual that you'll use. Whether you want to learn, bone up, or be the one who has all the right vocabulary at the drinking fountain - this is a book you should give a chance to. It surprised me and I manage a significant IS dept. I think you will consider it a value-added addition to your library!