This is definitely a must have for anyone who is serious about IP routing. Jeff, all you have to do is let us know when vol. III will be out and consider it bought.As a CCIE I find this book invaluable as a rich source of information.
All I can say is that my jaw was open the whole time I read this book due to the sheer amount of quality information in this book and the way it is presented. If you work with catalysts BUY this book. This is the spanning tree bible.