If she's trying to learn DAX (which you can use in Excel, which she probably knows already), then get Rob Collie's book -- it's on his website powerpivotpro.com I have most of the DAX books, and Rob's book is by far the best introduction to the subject. After that, she could read some of Ferrari & Russo's stuff. The DAX Patterns book is pretty approachable, and available on F & R's website, daxpatterns.com No need to buy anything, you can download all the files and play with them.