This is a book I keep reviewing at every release, and for good reason: it is not mainly aimed at seasoned users of Visual Studio but at beginners approaching this IDE for the first time.
This is why you won’t find many changes from 2013 to 2015 – because an IDE doesn’t change as much. But I still recommend it, because of its role as a one size fits all overview of the development stack we use these days.
It is still worth it if you need a reference on your shelve (like I do 
), or because it also has good and quick code examples. Eventually I realised one of the biggest improvement is the size of the font from last version’s – it is more readable.