New Book on the Query Optimizerhttp://sqlblog.com/blogs/andrew_kelly/archive/2011/04/09/new-book-on-the-query-optimizer.aspx  A friend of mine Benjamin Nevarez has written a book on the inner workings of the Query Optimizer and it was just released. I read a preview and was definitely impressed so I expect the full version to be just as good. More details can be foundenCommunityServer 2.1 SP2 (Build: 61129.1)