Hi Cindy,
I have Aaron Wall's
SEO book, which is great, but it's $79. (It's also over 300 pages and I don't have time to finish it yet) I haven't read "Internet Marketing for Dummies" but those books are usually pretty good and easy to read.
I learned by reading forums like this and forums specifically geared to
SEO. Just google
SEO forums and you'll find them. I don't think I'm allowed to provide links to other forums so I won't.
Blogs are good too. Check out Aaron Walls seobook.com blog. It's great. There is also seomoz.com and for internet marketing especially I like hubspot.com and marketingprofs.com
And, of course, Seth Godin. Just google his name and you'll find tons. He's got a real "modern" perspective on marketing in general. And, he thinks like I do, which is one of the reasons I like him so much.
And, of course, check out our
SEO section at this forum first. Oh, and the google blog.
Happy reading