Strongback is an open source Java library that makes it easier for you to write and test your robot code for FIRST Robotics Competition. You use it along with WPILib for Java, and you deploy it and your codebase to your RoboRIO. Strongback is:
This book gives an introduction to Strongback and explains the benefits of using it, and it explains how to get started with Strongback by downloading and adding it to your robot codebase. The book then goes into detail about the different parts of Strongback and how you can use them. Finally, since Strongback is open source, it explains how you can contribute to the Strongback codebase, website, and even this book.