I'm glad you're finding the book useful. If you have any questions or comments, please post them here and I'll try to help.
Also post a review when you have the time! Reviews are really important for a book's sales.
As for more advanced books, I donât have any planned now but you never know.
Also my WPF book WPF Programmer's Reference
and database book Beginning Database Design Solutions
The WPF book focuses on WPF so it uses XAML as much as possible, and uses C# where it needs code behind the interface.
The database book is about database design and modeling and doesn't really explain how to build a database application in any language.