As Spotify discernibly grows the audiobook market with their inclusion of 15 hours of audiobook listening per month as part of their premium subscriptions, Amazon has responded with their own similar offer. In a press release on Tuesday, they announced that Amazon Music subscribers in the US, UK and Canada can listen to one full audiobook per month as part of their Unlimited plan, at no additional cost. They say it’s available across the full Audible catalog of over 1 million audiobooks.