This is one of the best few technical books I've ever came across.
One of the challenges for any technical book is how one should present the material so learning will be the most effective.
This book goes through major aspects of VBS as a language: Functions, Statement, Language, Objects, etr.
If you are programmer - you will be right at home with this structure.
The marvel of this book is that each small chapter is presented with real life easy grasping example. Not only examples are easy, but they address 100% practical matters.
For instance: I had to write a program which would remove older files recursively from folder using filter conditions.
Book had similar examples on how to traverse files, process their extensions, names, creation dates, size, not in one example. But you could pick up techniques used.
Author DOES know and programs VBScript and shares his wisdom in easy understandable way.
I was able to create few not so simple programs within 3 - 4 hours of reading this book.
Having so many books around on this subject, the fact I found this book was a deciding factor of me being able to program (albeit very slow) with vbscript.
Thank you Jeffery!