Audible was bought by Amazon in 2008, and is now available in numerous countries and still growing. You can sign up to its 30 day free trial to try out the service through Amazon.co.uk or through Audible.co.uk. During the trial you get a completely free audio book, which is yours to keep for life even if you cancel.
How does audible compare with competitors?
Audible like to boast they have the largest selection of audio books with, with ten's of thousand's more than any competitor, however this is self proclamation. Being the most well known in it's particular niche it could well be true. A single credit is worth 1 book, no matter how much the book is worth.
Audible vs Google Play
With Google you purchase books outright, this means you will be paying $5-$10 per read, whereas with Audible you will be paying the same amount for say 5 credits to read 5 books (depending on your currency and Audible plan). It is also worth considering the fierce competition between Google and Amazon. It would be no surprise if in the near future Amazon block all books other than those bought from Audible being read on Amazon made devices.
You will have access to thousands of titles suitable for adults and children. With a vast selection of the best selling series such as Harry potter, Harry Potter sequels, Game of Thrones, Prequels and much much more.