I am still working on this book, and whilst I was hoping to have had this in print by now, it's now likely to be out late 2004 (I've moved and had a baby). Some samples will be available here soon.
Should anybody be especially interested in having this book, mail me and I'll make sure you get an early copy (and a discount).
Awk is a specialised text processing utility, that whilst very powerful, doesn't do much other than process text; it's not an multi-purpose utility like Perl. Awk can be thought of as a super grep-sed-cut command, with a programming language included for versatility.
You cannot teach awk by simply describing the 40 or so builtin functions; awk's capabilities have to be demonstrated.The book is organised in the following sections: