Custom version of Titillium for interactive eBook (http://www.chialab.it/interactive-ebook-promo/).
Main project homepage: http://www.campivisivi.net/titillium/
Specimen: http://chialab.github.io/titillium/
for latin extendend use: https://fonts.google.com/specimen/Titillium+Web
Using bower:
bower install https://github.com/Chialab/titillium.git
Using npm:
npm install https://github.com/Chialab/titillium.git
Or download here
Titillium Text
<link rel="stylesheet" type="text/css" href="titillium-text.css">
Titillium Text Upright
<link rel="stylesheet" type="text/css" href="titillium-text-up.css">