Google is the best author of seo related book or eBooks. Read Google's Search Engine Optimization Starter Guide at here http://static.googleusercontent.com.../search-engine-optimization-starter-guide.pdf It is not book or ebook but is free and useful.
The problem with SEO is that it becomes stale sooner than other topics. It is a continuously changing science. Although there are good books, any significantly sized book will find it difficult to keep up. Instead read all the content there is to get a really good idea of what to do.. 1. moz.com 2. searchengineland.com 3. searchenginejournal.com/seo-guide 4. copyblogger.com (strange to relate writing good copy to SEO, but true)
If you really want to read some good SEO related news then go for Google's guide its simple and also look out for different forums and ask your difficulties which you are coming through. You will get all your answers in Forums. But before that reading is important.
For the best performance we need to follow the Search engine guidelines. that is why i prefer to use the E-book of Google SEO strategies. below website have the SEO E-book by Google.com. http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/en/us/webmasters/docs/search-engine-optimization-starter-guide.pdf
I'd like to propose some tutorials instead of book. Maybe Lynda.com with its video learning could be the choice.