Whilst I generally use Intellisense, VS Help, MSDN, Web Search (in that order) to work things out, its great to have such a comprehensive treatise on VS 2008 on your desk. It enables you to browse through topics to get an indepth discussion.
I particularly liked the Generics etc in chapter 11 as well the Language-Specific material (especially VB
's my and its possible use in C#) in chapter 12.
Great work Nick and David.
Looking forward to your VS 2010 version