g>easybook</strong> already includes a theme for each edition type (<code>pdf</code>, <code>html</code>, <code>html_chunked</code>), so your books will look professional without any effort.</p>

<p>Bundled themes are located in the <code>app/Resources/Themes/</code> directory. If you need to change the design of your books, <strong>don't</strong> modify the files in these directories. The next chapter explains how to easily override any template or resource for your book.</p>

<h3 id="default-contents">2.3.