Powerpivot is an addin for Microsoft Excel which enables analysis of larger data sets (>1M rows) within Excel and also more sophisticated analysis that typically would involve multiple SQL queries with complex data joins. I blogged about learning Powerpivot last year. One of the difficult things is the lack of usable documentation or cookbooks on how to use DAX the new language MS has created for the tool. I came across this book in the bookstore — almost zine like in format, it has practical, useful ways to use Powerpivot for data analysis (and how to avoid the traps). It’s a bit pricy at $29.00, but worth the investment. Recommended.