# GitBook FAQ

#### How can I host/publish my book?

Books can easily be published and hosted on [GitBook.com](https://www.gitbook.com). But GitBook output can be hosted on any static file hosting solution.

#### What can I use to edit my content?

Any text editor should work! But we advise using the [GitBook Editor](https://www.gitbook.com/editor). [GitBook.com](https://www.gitbook.com) also provides a web version of this editor.

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#### Should I use an `.html` or `.md` extensions in my links?

You should always use `.md` extensions for your relative links, GitBook will automatically replace these links by the right value when the pointing file is referenced in the Table of Contents.

#### Can I create a GitBook in a sub-directory of my repository?

Yes, GitBooks can be created in [sub-directories](structure.md#subdirectory). GitBook.com and the CLI also looks by default in a serie of [folders](structure.md).

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#### Does GitBook support Math equations?

GitBook supports math equations and TeX thanks to plugins. There are currently 2 official plugins to display math: [mathjax](https://plugins.gitbook.com/plugin/mathjax) and [katex](https://plugins.gitbook.com/plugin/katex).

#### Can I customize/theme the output?

Yes, both the website and ebook outputs can be customized using [themes](themes.md).

#### Can I add interactive content (videos, etc)?

GitBook is very [extensible](plugins.md). You can use [existing plugins](https://plugins.gitbook.com) or create your own!