Overall I felt this book provided many good and well structured examples of an OSPF designed network. However, it became apparent immediately within the first few chapters that typo's abound. This may or may not be an issue for a person already familiar with OSPF and TCP/IP, but for those readers who are trying to acquire first hand knowledge of OSPF I would pass on this book until the reader was able to correctly identify, confirm and read through such inaccuracies. Too much time is wasted re-reading the text to determine if the reader "misunderstood" the text or if the text is inaccurate. Many of the inaccuracies are within the beginning chapters, including the diagrams and pictorials themselves.
With these inaccuracies fixed and "proofread" this COULD be a first rate book. I find it very hard to believe that Cisco put their signature on this book.
The Author did an excellent job of defining the scope and complexity of OSPF, but needs to provide a "concise and accurate" manual. As with most technical publications, books such as these end up being used as reference material. Therefore, a single mistake cannot be tolerated.
It is NOT of the caliber of even the most basic Cisco Press training products (which serve double duty as first time reading material and future reference manuals).
Buyer beware.