Overture

What is the best book or course on how to succeed with an Overture account ? I'm not really interested in other Pay Per Click Engines, because I've tried many of them with no success, Anyway, Overture is by far the biggest and is associated with Yahoo listings, so, that's the one to learn about.

I already have an Overture account, but, I find that it is difficult to make money, mostly due to the high costs of the #1 to 3 listings per keyword. As you know, it's important to get in only the top 3 because your ad gets into Yahoo for free that way.

Anyway, I figure that some companies are succeeding at Overture and I want to learn the process.

If any one knows of someone who really is making money on Overture, and not just claiming they are, please let me know of any course or book.

Thanks very much.

Ken Black
http://golfrevelations.com