Learning Unix and AppleScript on Lion

Hi everyone,
I want to learn Unix on OS X Lion and AppleScripts very well. I've been a Mac user since Tiger OS X, but now I've decided to be serious about Unix and AppleScript. Can anybody recommend good books for this purpose. I would like to have books which start from basics but later go on to great details to fully explore these two things. I really need expert opinion here, plz.
Best,
Naveen

If you already know something about unix commands, there is a scripting tutorial at http://www.tldp.org/LDP/abs/html/index.html
If you need a tutorial on unix commands, http://osxfaq.com/Tutorials/LearningCenter/UnixTutorials/LoseTheMouse/index.ws had a pretty good tutorial, although at the moment, that link isn't loading for me now so I don't know if it is still up online or not.
for creating logout hooks, http://www.bombich.com/mactips/loginhooks.html might help.
Also, in Terminal, type man launchd.plist if you can think of a scenario where you could implement a "cron-like" solution. Then refer to Apple's own periodic daily/weekly/monthly launchd plists (com.apple.periodic-*ly.plist) at/System/Library/LaunchDaemons/. There are more triggers available than just day/date/time, such as "watchPaths" and "RunAtLoad." Home grown launchd plists ones should go in /Library/LaunchDaemons/ or Library/LaunchAgents, not /System/Library/LaunchDaemons/. Also man launchd (no ".plist").

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