If you want to know the new Microsoft SQL Server 2012, I highly recommend you to download the SQL Server 2012 free e-book (288 pages - 10.8MB) wrote by Ross Mistry and Stacia Misner. I already read it! It's a very interesting book that you should take a look!
PART I - DATABASE ADMINISTRATION (by Ross Mistry)1. SQL Server 2012 Editions and Engine Enhancements
2. High-Availability and Disaster-Recovery Enhancements
3. Performance and Scalability
4. Security Enhancements
5. Programmability and Beyond-Relational Enhancements
PART II - BUSINESS INTELLIGENCE DEVELOPMENT (by Stacia Misner)6. Integration Services (SSIS)
7. Data Quality Services
8. Master Data Services
9. Analysis Services (SSAS) and PowerPivot
10. Reporting Services (SSRS)
And not forget… if you want a more specific book about SSIS 2012, don’t forget to buy the book I wrote and will be published during the next days.