Good for someone who wants to learn the basics of Arduino and go through simple functions. I'm someone who would have benefitted more from a higher-level book on Arduino projects, such as power supply controllers, motor drivers, or test and measurement devices. The book does exactly what it says on the cover...gives the experimenter enough resources to get started. There's even a decent practical example in the book - a water level sensor and automated irrigation system. Not my thing, but it's obvious that someone could find worth in it.