Quite simply the best book on automating InDesign with XML,
Verified Purchase(What is this?)
This review is from: A Designer's Guide to Adobe InDesign and XML (Paperback)
Title says it all, this book is simply brilliant.
It's a bit out of date now, should really be updated for CS5 & CS5.5, but if you are on older versions, this is one of the best books on this subject!
But if you are not familiar with this kind of thing, be aware that there is a fair bit to learn here, but worth it for the potential it offers!