Well, there's the 'Sandman' series by Neil Gaiman. It has a complex and vast narrative that often feels like it could go on forever. The different story arcs and the rich world - building create an immersive experience that is somewhat similar to the idea of a never - ending story. Also, 'The Chronicles of Narnia' has a kind of eternal quality to it, especially when you consider the multiple books and the overall world that C.S. Lewis created. It's as if there are always more adventures to be had in that magical land.
One could be 'The Arabian Nights'. It has a collection of stories within a story structure, which gives a sense of an unending flow of tales. Another is 'One Thousand and One Nights', which shares a similar quality of continuous storytelling.
There are several stories that might be similar. 'The Dark Tower' series by Stephen King has an overarching plot that spans multiple books and has a very open - ended feel. It's a long and complex journey that could be seen as never - ending in a sense. Then there's 'The Wheel of Time' series, which has a huge world and a long - running narrative with so many characters and sub - plots that it gives the impression of a story that could keep going and going. Additionally, some folktales and fairy tales collections, like Grimm's Fairy Tales, have a large number of stories that can seem unending when you consider all the different versions and interpretations that exist.