 Both the book and the movie assert that the central story is from a book called "The Princess Bride" by a nonexistent author named S. Morgenstern.In the Welsh novel, "Aelwyd F'Ewythr Robert" (1852) by Gwilym Hiraethog, a visitor to a farm in north Wales tells the story of "Uncle Tom's Cabin" to those gathered around the hearth.Sometimes a frame story exists in the same setting as the main story.