The author’s sense of humor and weird analogues makes this a bit of a burden to read. Real life datasets and examples are nice though. Probably worth looking into if you are fetting started with spark with a regular developer background.
The book is pretty well written, with even a drop of (unexpected) humor. This, with the good addition of well done illustrations makes this book an honorable "in action" series member. However, I quit with a feeling of frustration, because examples are rather fragments, written trhough the CLI. I have no idea what a full fledged "hello world" would looks like ! And this is only fragments because the subject was indeed very large. I think the authoe would have better leave the advanced subjects for another book. Because this one is really compact ! Ma note de lecture en Français ici