One example of fan fiction could be a story set in the Harry Potter universe but featuring characters and plots not originally written by J.K. Rowling.
One example could be 'The Lord of the Rings'. It's a fantasy fiction that has captured the hearts of millions worldwide with its epic story and richly developed characters.
You could consider 'Wolf Hall' as an example. It's based on the life of Thomas Cromwell in the Tudor era and offers a rich and detailed fictional account of that historical period.
I think 'Blade Runner' is a classic example of science fiction. It shows a dystopian future with advanced androids and questions about humanity and identity.
Well, 'Dune' is a great example. It imagines a complex future society on a desert planet with unique politics and technologies, which are key elements of speculative fiction. It presents scenarios and concepts that are beyond our current reality but still plausible within the framework of the story.