You can add your own fonts by including them in the _project/_fonts directory, which makes them accessible to all build types, or by including them from remote sources in the _overrides.scss file, if they are only needed for the Reader and Web builds.

Tip: Check the license of the fonts you'd like to include as many type foundries will not allow you to distribute the files, which will happen if they are included in the _fonts directory.

Move or copy font files into the _project/_fonts directory and reference them with @font-face declarations. The fonts will be automatically added to the builds.

Note: Not all e-readers support user-defined fonts. For iOS and macOS, it's necessary to add ibooks_specified_fonts: true to your project's config.yml for user-defined fonts to render.

Import fonts from an external URL using the standard @import statement:

@import url("https://url/to/my-font.ttf");

Note: E-readers will not typically support loading remote assets, so while this method may be useful for the Reader and Web builds, it is sub-optimal for standalone readers.