First Word: If you get this book, I don’t suggest doing so for a black & white device or a handheld. (So small Kindle is likely a bad idea. iPad would be fine.) There’s a lot of graphics and meaningful color use, so I think small screen or b&w would be a bad experience.
As to the content…
If you’re doing anything with big data, designing dashboards, or otherwise dealing with info graphics, this is a great read. We’ve had the cliche of “Death by PowerPoint” for awhile now, but the reality is solid presentations and graphical representations of data can show us patterns and clarity in data not typically available from raw tables. (Even if a lot of the weaker efforts have resulted in serious audience abuse via PowerPoint.)