How do I learn more

I am very interesting in making macros and have made a lot, which have proved to be extreme efficient. Basically they are made on recording, in combination with harvested/copied codes as well as handwritten codes.
I have examined the book Excel 2007 Macros by Gail Perry.

I would like to improve myself further and wondering how I can do it.
I have a book named Visual Basic 2008 by James Foxall (Sams Teach yourself in 24 hours) which is a 500 pages ‘starter kit’.
Can this book be useful?

Is Visual Basic 2008 a separat program I have to buy? And if so, if I buy the VB-2008, can that be used in my excel versions.

As you see, I need to have some basic information regarding what to do.

Saturn