shell scripting

Hi all,
I have a couple of books on korn shell scripting, but when i start doing some scripting i run into difficulties that i end up running to this forum for information. For example, today i needed to know how to parse a directory name that is a date and i saw some examples that just confounded me on how the writer came up with this answer. They were right on the money. It's nothing i found in the books. Any ideas on a good book on korn shell scripting?
:o

"Learning the Korn Shell" from O'Reilly is excellent.