Twists are super hard to write - especially as what would be foreshadowing for one reader might telegraphing for another (depending on their ability to guess or familiarity with how writing works).
I liked the twist at the end of Great Expectations - but finding it hard to think of any others.
Hi Jenny - Yes, it is hard. I think the more books you read in a certain genre, the easier it is to pick the twists too. For the example I gave at the start, there were other reviewers who thought it was a fantastic twist. And I know I've missed twists that friends have picked up. Also interesting now that I'm approaching it as an author and trying to put twists into my own manuscript. Hard to know whether there's too little or too much foreshadowing until it goes to beta readers. I think that's one thing I loved about 'The Secret Keeper'. It wasn't the twist so much that was incredibly unique, but the brilliant set-up. I can only aspire - LOL Thanks for your comment :)
PS Oh and thanks for the suggestion re Great Expectations. I haven't read it, so that might be one to add to my list.