I really wanted to like this book. Don't get me wrong, it's a decent book but after using the Lammle/Sybex book to pass my CCNA this book is a let down. This book, though not intentionally, is two books. The first half is well-written and explains IGRP, EIGRP, and OSPF in an in-depth, easy-to-read fashion. The second half covers BGP and leaves you scratching your head. I don't know if the topic of BGP is so complicated it's hard to put into words, but considering how much of the book covers BGP (3/10)I will have to look elsewhere for more information.Addendum - I took the routing test for the CCNP and I can honestly tell you this book is useless unless you like a birds-eye view of information. I knew this book cover to cover, and still there were topics and commands on the test I had never seen before. I also used the corresponding cram session (again I knew it cover to cover)...and the Sybex virtual trainer...and guess what...I failed! (In case you're wondering if it's just my intelligence, I have a master's degree in aqueous geochemistry).Stick with the Cisco books...a bit more dry to read, but far more informative.