Book excerpt: Software is eating the world, and GitHub is where software is built. GitHub is also a powerful way for people to collaborate on text-based documents, from contracts to screenplays to legislation. With this introductory guide, you'll learn how to use GitHub to manage and collaborate with developers, designers and other business professionals more effectively. Topics include project transparency, collaboration tools, the basics of Git version control management and how to make changes yourself - without having to bother your development team.