Want to learn more about the Arduino? Get a copy of Getting Started with Arduino by Massimo Banzi, co-founder of the Arduino Project. This valuable little book offers a thorough introduction to the open source electronics prototyping platform that’s taking the design and hobbyist world by storm. Getting Started with Arduino gives you lots of ideas for projects and helps you get going on them right away. To use the introductory examples in this book, all you need is a USB Arduino, USB A-B cable, and an LED.
In the Maker Shed: Getting Started with Arduino book