Pretty much the books others have said. There's not really a specialized book, as there really isn't anything specialized with how Drupal handles databases. That's mostly due to the fact that Drupal is able to function on different databases. The database documentation on DO is really some of the best too:

https://drupal.org/developing/api/database

For more generic reading, anything on PDO will be really helpful, as it will give you the basic idea of how PHP and databases communicate. Also any general MySQL book to help learn the basic ideas behind relations, transactions and building optimized queries. 

Jamie Holly
http://hollyit.net

On 1/13/2014 6:36 PM, Tony wrote: