This is the same 1996 edition in a new cover. A big clue was the list of suburban Chicago libraries still with the 708 area code. Most of them changed to 847 in 1996.
I don't see any mention of the Internet either. There is a lot of info online for Chicago/Cook County research.

The basic information is very informative and I have helped several people by using this book.

I am awaiting the revised edition.