Amazon.com just posted my three star review of LAN Switch Security: What Hackers Know About Your Switches. From the review:
I really looked forward to reading LAN Switch Security (LSS), simply because it covered layer 2 issues. These days application security, rootkits, and similar topics get all the press, but the foundation of the network is still critical. Unfortunately, LSS disappointed me enough to warrant this three star review. I'm afraid those before me who wrote five star reviews 1) don't read enough other books or 2) don't set their expectations high enough.
The bottom line is that if you want to read a good Cisco security book, the best available is still Hacking Exposed: Cisco Networks.