This book contains the background that’s missing from other tutorials. Here you’ll learn key concepts so you’ll have a solid foundation for continued study. Whether you choose to continue with another book in this series, a video course, or a code school, everything will make sense when you start here.

You can read this book anywhere, at your leisure, on your phone or tablet. Use this book to gain background understanding when you are not at your computer. With Book Two, the next in the series, you’ll need a computer at hand so you can build your first web application.

In Book Two, you’ll build a working web application so you’ll gain hands-on experience. Along the way, you’ll practice techniques used by professional Rails developers. And I’ll help you’ll understand why Rails is a popular choice for web development.

You can start with Book Two before finishing this book if you’re eager to get started building your first application. In fact, …