I am a beginner using Arduino and the C++ programming language.
I cannot rate this book high enough for Arduino newcomers and am surprised at the low number of reviews compared to Amazon US. My first sketch was using the Servo which worked first time with the help from the excellent schematic diagrams.
My second sketch was driving two motors using a H bridge. Again, with the schematic diagrams I had a small track tank running backwards and forward using modifications of Michael's code. My next sketch used an ultrasonic transducer for distance determination for the above tank. I was able to download all the code from O'Reilly's website. Contrary to a previous reviewer I find the explanations clear and easy to understand. The code is well documented and I am already creating my own functions instead of copying willy nilly. With twenty pages of an Index it is not difficult to locate information. There are numerous tips and tricks covering code problems, electronic components, reading data sheets and other resources. From being a failed hobbyist assembly code programmer trying to get PICs to work, I now can realise my projects with ease thanks to this cookbook. Yes, you can find most of the examples on the web but having a 600 page reference saves a great deal of time. If you are new to Arduino this is the only book you will need. Look at the US reviews from the experienced Arduino programmers for confirmation.