Thanks for that, PalTip. It sounds like a useful link. But if I already have amazon, but just want to change the ads my friend put on it, I’ll have to find out how he did it first, won’t I? Or maybe not. You can see what a nontechie I am that I don’t know how the plugin would help.
And thanks again WPyogi. I didn’t realise code would be visible to visitors, but the site is https://www.ebooksfreetoday.com. So maybe, as you say, someone will be able to advise after looking at it. I really do appreciate all the help. I’m a writer, so in return may be able to help someone with content at some stage.