Ch. 3: The Arduino Platform in  Getting Started with Arduino is another introductory chapter. This chapter focuses on:

• Explaining the Arduino hardware, such as the Arduino Uno, which is what I have
• Telling where to download the Arduino IDE, which is very similar to the Processing IDE
• Installing drivers on your desktop computer
• Identifying the port that connects with your Arduino

Got it. Real stuff in the next chapter.

Completed:

• Getting Started with Arduino, 2e, Ch. 3: The Arduino Platform (0 exercises)
• Sketches (i.e., code) can be downloaded from http://db.tt/f6x9Q4NA