Book opinions: Google Hacking for Penetration Testers

This isn't in the review section because I haven't read it yet...I'm asking for a review and information from those who have. It comes highly recommended from my co-workers here, but as always I trust the AO community for a fair, unbiased opinion. :rofl:

Google Hacking for Penetration Testers
- by Johnny Long, Ed Skoudis (Foreword), Alrik van Eijkelenborg (Editor)# Paperback: 544 pages
- Publisher: Syngress; 1 edition (December 1, 2004)
- ISBN: 1931836361
- Product Dimensions: 9.1 x 7.1 x 1.2 inches
- Shipping Weight: 1.8 pounds.

Anyone read it yet, and have input? I've been told it is an excellent follow-up to Network Security Assessment by Chris McNab...

Network Security Assessment
- by Chris McNab
- Publisher: O'Reilly
- Pub Date: March 2004
- ISBN: 0-596-00611-X
- Pages: 396

I'll be plowing through McNab's book via my Safari Bookshelf, but Google Hacking isn't available via Safari (yet) so I'd like to know if it's worth cold hard cash.

Thanks!