XSL book recommendations

I've searched the archives but can't find anything specific on this topic.

Can anyone recommend a good overall XSL reference book?
My preferred style is a functionality walk-through with practical usage 
examples.
Is there anything like that that anyone could recommend?

As this is a little OT, feel free to reply privately and I'll summarize 
back to the list.

Many thanks,

--
drew mclellan
http://www.allinthehead.com/


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