Looked into this because it was recommended by Maven Analytics whose training vids are awesome. I love this book. Great for learning and for a reference tool. I appreciate that they really stress learning the underlying concepts/theory instead of just giving cookie cutter patterns to use.

I have been reading this book for 5 months. I am not finished. I spend a half hour every day. Marco Russo and Alberto Ferrari are teachers and very good ones. There is so much effort put into this book it feels like they actually care about you and your DAX journey. I have gotten so much out of this book. Though I can't say that I truly understand it. Yet I see that my DAX has improved quite a bit. With many mysteries still remaining. I am just an average person trying to be a bit above average and I thank the authors for helping me in my quest. I highly recommend this book. Though if I were starting off from scratch I would read Matt Allington's book Supercharge Power BI and possibly Power Pivot and Power BI by Rob Collie and Avichal Singh though that book is a bit older. In summation: my lack of understanding is my issue, the book itself is extremely comprehensive and well written. So I will continue on my DAX journey and hopefully will continue to improve as I make my way through the final 3rd of the book.

I love this book! The authors know their audience. It's written in such a way that the reader feels as though they're being taught by instructors. They give helpful learning tips along the way and know when a certain topic is especially difficult. For example, at the end of a certain arduous chapter, the conclusion starts, "In this final section of a long and difficult chapter..."

Upon completion, it is easy to go back and use as a guide for specific topics as they arise.

Great book content-wise, but I bought it new and the binding is damaged, corners are bent, and some pages are creased. Should have just purchased a used copy.

This was a really important book for my understanding of Dax formulas. I watched a lot of videos online, and forums can often give you formulas that will solve your problem but I never fully understood what was happening.

I feel very confident now after reading this book. I can visualize what is happening with my model and it has made writing Dax much easier. I'm not saying that I'm an expert or that it's easy now, but I know how it works and the functions that are available to me. If you really want to know what's happening, this is the book for you.

This book is really helpful in breaking down the complexity of each function into clear explanations & examples. Thank you so much for the authors. I'm really happy with my purchase

Reading this book makes me realize how little I know about the things I thought I knew. I've been writing DAX for years, having started with PowerPivot (no spaces in the name, that's how old) for Excel 2010, and in my job I still find new, interesting problems to solve. This book is an amazing reference for anyone interested in pushing the calculation envelope in DAX and their models. I've built models spanning billions of records with the expert guidance this book provides.

I would almost consider this a holy book of the DAX religion. If you ever wanted someone to explain why god created CALCULATE() and how we should observe it daily in our lives, this is the book, and the Italians preach adeptly. I'm a big believer, and you will be too.

Highly recommended to anyone working with DAX in Excel or PowerBI. From the top DAX trainers in world, this is a must have in your DAX library. Well Written. Easy to follow. Examples are thorough.

If you want to masters DAX, it’s the perfect book. They explain complicated things very well. Also they give multiple examples. It’s for all the public, from beginners to experts.

Un libro ideal para conocer todos los secretos del lenguaje DAX, escrito por dos de sus creadores

Une vraie somme de savoir. Comme le disent les auteurs, il faudra le lire plusieurs fois (et je n'ai pas fini lecture No 1)

C'est néanmoins didactique : le livre avance pas à pas (et c'est vrai parfois à grands pas). A mon avis indispensable si on veut comprendre (voire maîtriser) DAX

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This book is brilliant. In very easy to understand language, it takes a deep dive into DAX, explaining the seemingly inexplicable and making sense of complex concepts. This is a book that any-one who plans to write DAX should buy.

So as not to mislead you, the book expects you to have a basic understanding of DAX. If you are new to DAX, start off with an introductory book. Soon, you will want to know more and then this is the book for you.

Thank-you to the authors for great context and communication.