Nmap book by Gordon “Fyodor” Lyon

Nmap is a free and open source utility used by millions of people for network discovery, administration, and security auditing.

Its original author, Gordon “Fyodor” Lyon, wrote "Nmap Network Scanning: The Official Nmap Project Guide to Network Discovery and Security Scanning" to share everything he has learned about network scanning during more than a decade of Nmap development.

The official publication date is January 1, 2009, though Amazon is already selling it.

The final table of contents is now available : about half of the content is available in the free online edition, but the print edition adds a lot of exclusive content:

• “Detecting and Subverting Firewalls and Intrusion Detection Systems”,
  
• “Optimizing Nmap Performance”,
  
• “Port Scanning Techniques and Algorithms”,
  
• “Host Discovery (Ping Scanning)”, and more.
• The solution selections which provide detailed instructions on the best way to solve common networking tasks are also exclusive to the printed book.
  

Already ordered mine :)