Oh, there definitely is an ending, just not the kind that anybody was expecting. It took me a while to accept how the series concluded, but now that I've had time to think about it, I do like how the last book ended. And if you are a fan of King, then I give the Dark Tower series my full recommendation, with the suggestion that you read The Wind Through the Keyhole at its chronological place in the series, and not last. It may take awhile to get through all eight books, but it's well worth it. I am thinking about going through the series again myself.