Start with the first book and then work your way down to the more advanced stuff:
1. The ABC of SEO by David George
2.
http://movielibrary.lynda.com/html/modPage.asp?ID=209
3. Search Engine Marketing, Inc.: Driving Search Traffic to Your Company's Web Site by Mike Moran and Bill Hunt
4. Google's PageRank and Beyond: The Science of Search Engine Rankings by Amy N. Langville and Carl D. Meyer
5. Web Metrics: Proven Methods for Measuring Web Site Success by Jim Sterne
6. Marketing Metrics: 50+ Metrics Every Executive Should Master by Paul W. Farris, Neil T. Bendle, Phillip E. Pfeifer, and David J. Reibstein
These books will give you principles and concepts that you can always use but you will need to gather alot of information online. By the times books hit the printer the search engines have made changes to what my be in the books.