Ruby is famous for being easy to learn, but most users only scratch the surface of what it can do. While other books focus on Ruby's trendier features, The Book of Ruby reveals the secret inner workings of one of the world's most popular programming languages, teaching you to write clear, maintainable code.

You've experienced the shiny, point-and-click surface of your Linux computer—now dive below and explore its depths with the power of the command line.

Ubuntu brings Linux to the masses, but it can still be intimidating for newbies, neophytes, and geeks-in-training. With Ubuntu Made Easy by your side you'll be ready to face any challenge, and you'll discover just how fun Linux can be.

Scratch is the wildly popular educational programming language used by millions of first-time learners in classrooms, libraries, and homes worldwide. By dragging together colorful blocks of code, kids quickly learn computer programming concepts and make cool games and animations.