Bootstrap is a free collection of tools used to create websites and web applications. It contains HTML- and CSS-based design templates for typography, forms, buttons, navigation and other interface components, as well as optional JavaScript extensions. Much has been written and said recently, in the world of web design and development, about Bootstrap. Some people call it a boon for web developers with little designing knowledge, while others call it a blessing for the designers. A user familiar with all that Bootstrap has to offer can extend the framework so that it no longer has the original look and feel of Twitter. This will allow you to use clever and novel ways of taking the power the standard library of Bootstrap has, and transform it into what you have envisioned. This is a practical, step-by-step guide to extending Bootstrap. It covers all the aspects of extending Bootstrap, including themes, customization, extending its plugins, and an introduction to several third- party Bootstrap plugins. Once you understand why you should use Bootstrap in the first place, you will learn about custom themes. This book then walks you through customization with CSS, and introduces you to LESS. You will learn to use Grunt.js to generate your own custom build of Bootstrap, customize plugins and grids, and even build custom plugins! Finally you will explore the most useful third-party plugins for Bootstrap and end with creating your first Bootswatch theme. This is a complete guide to unlocking the true power of Bootstrap. If you are an intermediate front-end developer or designer who wants to learn the secrets of Bootstrap, this book is perfect for you.