Ebook: Microsoft SQL Server 2008 Reporting Services Unleashed

I found that this book offered good general coverage on a variety of SSRS 2008 topics. For the most part it covered what (feature), how (usage), when(summary vs detail, global[graphical] vs specific[tablix]), etc.
However, key ingredient of SQL Server 2008 is extending XML support and that's conspicuously missing. Yes, there is some info but needs more like - data source and dataset differences from relational data types, typed vs. untyped XML data considerations, and query, filter, and criteria specifications for mixed (XML/relational) field reports.
Samples with XML data types would have been nice but more available on Microsoft TechNet and MSDN web site.