You'll need to add some card details but Amazon will only charge the £9.49 monthly amount after the promotional period ends. If you decide Kindle Unlimited isn't worth it for you, then you can ...

Kindle Unlimited subscribers get unlimited reading and listening on any device, with over 1 million titles, thousands of audiobooks, and selected magazine subscriptions available on any device.

You can walk away with Kindle Unlimited for free, without the hassle of scrambling around for a saving. Until Oct. 11, Prime members can get a three-month subscription to Kindle Unlimited for free.