This is a book about Lambda Architecture and how it is used in the context of Big Data.
I enjoyed reading about lambda architecture and other related concepts and found them useful since I was a complete beginner in this domain.

The first few chapters are definitely worth the read, the rest of the chapters I consider architecture reference material (too detailed to be remembered and, at the same time, requiring knowledge about the technologies being discussed). There were quite a few moments while reading it when my mind started to wonder off...

To sum up: read the first few chapters and then let google (plus the source code that accompanies the book) be your guide

And of course, the review would not be complete without the criticism of the architecture.