Two ordinary kids with an extraordinary job.Thelma and Tico are back on a dangerous new mission investigating the impossible. When thirteen-year-old Robin vanished without a trace while playing in the woods, his friends reported seeing a blinding light. The police believed he was kidnapped and never found him.Now, seventeen years later, Robin has suddenly reappeared-but he hasn't aged a day and looks exactly as he did when he disappeared.Can Thelma and Tico uncover what really happened during those missing years? Is Robin still the same boy who vanished, or has he become something else entirely?And is there a connection between Robin and the dancing lights in the skies above the mysterious Hessdalen valley known for its UFOs?THE GREY BOY is the third (standalone) book in the Bureau of Non-Event (BoNE) series.