Been on TCB and under free trials there's audible.co.uk being run by amazon. It;s for audio books etc that you can buy and download via the Amazon downloaded software.
I downloaded Robert Jordan & Brandon Sandersons Towers of Midnight for free - 5 files totalling about 40 hours listening (I think!). The final clincher for me was £4 from TCB just for giving it a bash.
After the 2 week trial it's 7.99 a month.http://www.topcashback.co.uk/audible/