If you want to gain an good understanding of SQL Server end-to-end, I have found Robert Vieira's books on SQL Server to be useful.
Here is one I recommend.
It is a good book and I recommend it for assimilating the theory.
If you need a good reference book I have found that Murach's books on SQL server to be useful.
Here is one I recommend.
This a good book for quick "cook book" type solutions.
