Yes the book is worth byuing, and you can get it from Amazon, link.

As you said you are already working with SSIS/AS/RS, so the exams should be easy for you. And with just brushing up on the topics that are asked in the exam you will be able to pass easily.

You can also refer to the MSDN Books-on-Line, check here you will get the links to the required study material to go thru.

Link: http://sqlwithmanoj.com/2013/12/05/preparing-for-70-463-exam-implementing-a-data-warehouse-with-microsoft-sql-server-2012/[/url]