Looking for a docbook example.

[Steven W. Orr]

Is there such a thing as a nontrivial book that is available for free 
online that also has the docbook src available? I'd like to learn docbook 
and I think having an available example would be a good starting point.

Also, I'm not clear on what the advantage of using docbook is over just 
using LaTeX.

BTW, I'm not sure if this qualifies as a proper question for this list, 
but I am running F9. :-)

TIA

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