gitbook-plugin-links

usage

1. add 'links' to plugins array in books.json
2. add 'links' to the pluginConfigs object

    "links": { 
      "links": [
        {
            "label": "Read PDF",
            "icon": "fa fa-file-pdf-o",
            "url": "some-link-to-the-pdf"
        }
      ]
    }