As far as Google AdWords Goes there are three main book or reports on the subject that I know of. I recently wrote my SEO Book and am starting to advertise it on Google AdWords.

I have already read Andrew Goodman's Google AdWords: 21 Pay-Per-Click Campaign Secrets Your Competition Doesn't Know twice, and think it is one of the best search engine reports on the market. ($69)

The other two main reports reports out there are the one created by Perry Marshall and Chris Carpender's Google Cash. I looked at the Google Cash one and saw that they are adding the Perry Marshall report in as an added bonus and are selling the Google Cash package cheaper than his report alone. Google Cash is directed toward affiliate sales. Generally I do not like affiliate sales as they do not build value, but I figure I should be able to learn some more great information between the Perry Marshall's Google AdWords report and the Google Cash report. It cost $49 if you want to give Google Cash a shot.

I will report a review of Google Cash and Perry Marshall's Google AdWords reports later this month or early next month. Either way the package comes with a 90 day money back guarantee.