Hi,
Beginning XSLT by Jeni Tennison would be a good choice for learning
XSLT together with XSLT 2nd edition programmers reference by Michael
Kay as a reference when programming.
It's been difficult to get hold of "Beginning XSLT" since Wrox went
under last year, but the good news is that Apress have just reprinted
it. See:
http://www.amazon.com/exec/obidos/tg/detail/-/1590592603
Cheers,
Jeni
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Jeni Tennison
http://www.jenitennison.com/
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list