Delphi in a Nutshell is exactly the book I have been looking for. Unlike most other Delphi books, it provides definative information on the language. It does not waste time covering basic Pascal syntax, nor does it redundantly cover visual program creation. The tutorial chapters are on the right stuff, object models, RTTI, and concurrent programming. The reference is excellent.
So when are you coming out with a book that treats the VCL in exactly the same way?