title: Custom Gitbook Themes
body: <p>Does anyone know how to modify the look of a git book? I've seen 2 books that have a different look from the default:
  <a href="http://codac.co/">http://codac.co/</a>
  <a href="http://coalman.github.io/tott-gulpjs/book/">http://coalman.github.io/tott-gulpjs/book/</a></p>
  
  <p>But can someone point me in the right direction of how to customize the look and/or build a custom theme for gitbook?</p>
  
  <p>I can't seem to find any documentation on customizing a gitbook. </p>