"Excel Power Pivot & Power Query For Dummies" by Michael Alexander provides a comprehensive guide to mastering advanced data transformation and modeling in Excel, focusing on ETL processes and DAX calculations. The book is available for purchase through retailers like Walmart and Barnes & Noble, with free access options including borrowing through the Internet Archive or local library services. Access a digital copy for borrowing at the Internet Archive . Go to product viewer dialog for this item. Excel Power Pivot and Power Query for Dummies