Book excerpt: Learn Julia programming by building fun projects, like launching rockets, building password keepers, and even coding battle simulations. Don't be put off by Julia's reputation as a scientific programming language. There's no data science or numerical computing knowledge required. You can get started with what you learned in high school math classes. Julia as a Second Language makes it easy to add Julia to your programming toolbox. You'll learn about Julia's type system and data structures by modeling the launch of a space rocket, use dictionaries to parse Roman numerals, discover tuples and arrays through tracking pizza sales, and use Julia's unique multiple dispatch feature to send knights and archers into a simulated battle. By the time you're finished, you'll be confident in the foundations of Julia and ready to dive into a specialized field like machine learning or data science. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications.