this is online tutorial for korn/bash shell scripting ......
http://steve-parker.org/sh/intro.shtml
following site has many links ...some them do not work anymore u can try them
http://steve-parker.org/sh/intro.shtml
if u want a book there is one book from indian author sumitabha das i dont remember name but i read it and it damn good book ...but u need to practice those examples given in book ....if u dont hv linux on ur machine d/w SFU from microsofts site and install