If you are looking for a nice introduction to the new features of Visual Studio 2012, I can heartily recommend Richard Banks 'Visual Studio 2012 Cookbook'.
This book covers a wide range of subjects including the IDE, .NET 4.5 features, Windows 8 development, Web development, C++, debugging, async and TFS 2012. This is all done in a easy to read format that will get you going with the key concepts, providing sample and links to further reading. A great starting off point.
There is stuff in the book for people new to any of the subjects as well as nuggets for the more expererienced users. I particularly like the sections on what is not in 2012 but was in previous versions, and what to do about it. This type of information too oftan left out of new product books.
So a book that is well worth a look, and has it has been published by Packt there are no shortage of formats to choose from.