Just checked my Amazon Account to ensure that I do not have a ‘Prime membership’. You pay £49 a year to have a Prime membership and this is deducted automatically from your bank account every year unless you request Amazon to not renew it. So, if you have an Amazon account then check it now. You can buy a lot of books at an indie store for £49.
To check log in to your account and go to the Amazon Prime part. And if you have trouble with this you can phone 0871 050 5519. They have things set up so that it is so easy to sign up for this. Harder to sign out.
All the more reason to shop local. Don’t remember my local bookshop ever charging me £49 a year to shop with them.