BAD LITTLE KID (in french : "SALE GOSSE")
From stephenking.com: Stephen's visit in Germany and France last November was not only for his fans a very special event, but also for him. To thank all his German and French fans for their warm welcome he came up with a great idea: He wrote a story, "Bad Little Kid", which will be available in e-book format from 14th of March just in German (Böser kleiner Junge) and French (Sale Gosse).
Lilja's Library gives this summery of Bad Little Kid: George Hallas is in prison. In one week, he is to be executed. He has remained silent for a long time, but now he opens up to his public defender, Leonard Bradley. He tells him how his dreadful deed came to pass. For Bradley, the confession will eventuelly have spooky consequences.