It's like a tutorial for how to use a giant caculator, on many fancy Wolfram language features such as image/audio/video processing, explore machine learning, geographic data and computation and plot, units, dates and times computation, etc.
It is somewhat like a technical version of Wolfram Alpha.
This book, is not useful to understand Wolfram language.
No perspective about variable, function, data structure, branch control, boolean, etc, topics needed for professional programers.
Not suitable for professional programers trying to code Wolfram language.
but since it's short, i can recommend it.
it gets you started on the feel of Wolfram language.
