The Definitive Guide to DAX: Business intelligence for Microsoft Power BI, SQL Server Analysis Services, and Excel Second Edition (Business Skills) Paperback – Illustrated, 20 July 2019

I've found this pretty brilliant so far, I've studied through to chapter 6. They say that chapters 4 and 5, on contexts and CALCULATE respectively, are the absolute key ones to nail and the difficulty does ramp up at this point, but apparently once mastered you're well over halfway there. Some chapters necessitate multiple readings, and you'll need to take notes.The style makes the first reading very easy but re-reading for note taking purposes is slightly more long winded as you have to skip through the educational "wrong" bits to keep only the actual correct stuff. I like this balance though because first read of new concepts in DAX can be very dispiriting.I feel that understanding this book cover to cover will make me a genuine DAX guru, and I would recommend it to you if that's your goal also

Best book for learning Dax thoroughly, later chapters more technical. I started learning with a more beginners book but when I needed deeper explanation and more advanced material this book is all you need. It’s a Dax bible that should be on everyone’s shelf who wants to learn the untracked of the Dax language

Amazing book, very well written and organised. I normally prefer watching training videos for learning but this has been far better. Concepts are clearly explained. For me, the biggest thing is that you not only learn how, you also learn why. This is very crucial

Really useful deep dive into all aspects of DAX, has been incredibly helpful to learning

This books doesn't require a lot of comments. It's the DAX Bible. The Definitive Guide to DAX means what it says - it's The Definitive Guide to DAX. You'll find (almost) everything about DAX in this book. It's not a book for fast reading. This book will stay with you for a while. Use this book to read about DAX, to understand DAX, to practice your DAX (using companion content, which includes a demo database), to optimize your data models and DAX. The book is not easy reading, because DAX is not just a list of functions, DAX is based on the fundamental concepts we need to understand. To understand the concepts of DAX you'll need help of an expert. Marco Russo and Alberto Ferrari are the best DAX experts and their consulting time is really expensive. But they put all their knowledge into this book which will cost you less than $40-50. If you're going to work with DAX you must have this book.

Not a work along / follow examples type book, just a brilliant explanation of the functions and theory of DAX.

Great book for anyone interested in DAX or working with DAX. Very useful especially if you have worked with DAX explaining a lot about the engine and all DAX formulas.

Really good explanations. Very detailed.