For the 70-410 exam there is a specialized book available (with some good reviews):
Exam 70-410 Installing and Configuring Windows Server 2012 (Microsoft Official Academic Course Series) (expensive)
There is also an exam reference available:
Exam Ref (70-410): Installing And Configuring Windows Server 2012
There is also a book available for the 70-411, but here the reviews are less promissing. To the reviews, I must add that one of the remarks is "that you need a lab at home to test and play around with this". I don't agree that this is a reason to break down
the book. If you plan to specialize in this subject, a playground environment for yourself is advised :). You only learn this by doing. So you will learn a lot more by troubleshooting and playing around yourself than by just learning a book.
Exam 70-411 Administering Windows Server 2012 (Microsoft Official Academic Course Series)
(expensive)
the exam reference:
Training Guide: Administering Windows Server 2012 (Training Guides)
The book for exam 70-412:
Exam 70-412 Configuring Advanced Windows Server 2012 Services (Microsoft Official Academic Course Series) (expensive)
For the 70-412 I didn't find an exam reference yet. According to the Microsoft Learning web site (see below) it is scheduled for August 2013.
For all of the exams you can see the list of "skills measurd" and available preparation options on the Microsoft Learning web site:
70-410
70-411
70-412
Dimitri C. - Please mark the replies as answers if they help! Thanks.