There are several books authored by Itzik Ben-Gan that are exceptionally good:

SQL Server 2008 T-SQL Fundamentals

Inside SQL Server 2008 T-SQL Querying

One of his SQL Server 2012 books is available now:

SQL Server 2012 High-Performance T-SQL using window functions

learndevnow.com has SQL Server courses available; only one is regarding 2012 but the ones about SQL Server 2008 would be helpful. The cost is $99 for the year.

I suspect you would be able to match most or all of the exam objectives to the books above.