What is the best way to learn about search engine optimization?

SEO is not as simple as it may seem. Although many site owners attempt to do it themselves, successful search engine optimization requires proper training and exposure on the topic. The best way to learn SEO is by reading an SEO book that is well written and covers the entire realm of SEO at the level of the actual reader so that a clear understanding can be conveyed. For beginners to the intermediate level, the material should be written for readers at that level in a manner that is best for them to learn SEO, which would be different than a book written for an advance SEO reader.