Various tools and resources that may be useful to readers of the book are available right here:
Ultimate Guide To Google AdWords
If you want to really learn how to get the most out of Google AdWords I highly recommend Perry Marshall and Bryan Todd's book. It's chock-full of information gleaned from years of experience creating and managing AdWords campaigns for a wide variety of clients.
How To Build A Website And Stay Sane
My business-oriented guide to (re-)developing a successful website. Aimed at the non-technical reader, it gives you the critical information you need to work productively with your web developer and build a website that will be a vital part of your business.
Inside AdWords Blog
A blog used by the Google AdWords product team: very useful if you want to keep track of all the latest changes.
Jon Oxer's eBusiness News
Jonathan writes an irregular email newsletter about website development and general eBusiness called "Jon Oxer's eBusiness News". You can read past editions and subscribe free to receive future updates online.