CiscoPress's "BGP-4 Command and Configuration Handbook" by Dr. Parkhurst packs a punch for it's size. Most Cisco books of any value require a forklift to carry them around. In just under 400 pages, this book succinctly explains a plethora of BGP commands. It is important to note, this is not a BGP-101 book, anyone using this book should either have a basic understanding of Cisco's implementation of BGP from other CiscoPress books (either Doyle or Halabi). The concept of this book is very simple - important BGP commands are discussed and also documented in configuration examples. It is very easy to understand the syntax of different BGP commands when displayed in this manner. There are a number of diagrams, showing the topology at hand. What I also like is that the book will often use different `show' commands to further document the use of the command. Appendix B is also of particular value, as it discusses regular expressions (something Cisco does a bad job at documenting - I think for awhile regular expression documents were an appendix to the dial section on the Cisco website).Overall, I wish there would be more of these type of command books published. If you have a 3 or 4 router lab network, you will be able to see the effects of most of these commands. Also, any candidate for the CCIE will find commands documented here that are not discussed in other CCIE books. I give this book 5 pings out of 5:!!!!!