any good published rails 3 books ?

Hi, I'm looking for a good books for rails3 that are available now,
unfortunately "Agile Web Development with Rails" and "The Rails 3 Way"
books will be released not before end of January/end of december.
Any idea ? thanks.
Dani

If you by the agile book at pragmatic programmer you will get access to the beta version but is like UD$20 more than amazon.