Finally O'Reily have released a Drupal book in the High Performance Series. It does not disappoint. It covers pretty much everything that you need to know about scaling a Drupal site beyond a single server.
The book could however cover a more about automating server builds with Puppet or Chef and integration with AWS. Particularly in regard to auto scaling.
I loved this book.It is presented really nicely. It is clear and easy to follow. The food is amazing. I particularly recommend the Beef Bouruignon recipe. I have also been lucky enough to have Camilla Stephens cook a slight variation of this for me. It is one of my favourite recipes ever.