Huffington Post co-founder Arianna Huffington has teamed up with Audible Studios to release a 'soothing and playful' adaptation of Margaret Wise Brown's Goodnight Moon, titled Goodnight Smartphone.

The audiobook, which is free to download at audible.com/goodnight, includes information about Huffington's nightly sleep regimen, and she commented 'I'm delighted to share my reimagining of one of my favourite books to address the particular challenges of today's adults, where the hardest thing to say goodnight to is not the moon, but our cell phones, our e-mail, and our social media'.