Charlie & the Chocolate Factory.
OT (kinda) but since this is the only other time I've *ever* seen this book referenced such: that is one of the creepiest, most disturbing books I ever read, as a child. Your DS is in good company. Or at least company. :P Ick, sends chills through my spine.
He is 16 and just last spring he asked if whe HAD to keep the Charlie & The Chocolate Factory DVD. It bugged him that it was sitting on the shelf. Oddly it really the only movie/book that I know of that he reacts to like this.
In second grade I got called into the principals office once because of a problem with DS. As I remember it the story was that the teacher had been reading above mentioned book to the class over the past few days. He knew my it bothered my son so he they had come to an agreement that DS could play educational games on the computer just outside class where he could see him during that time. But that day the schedule was rearranged and my son had either forgotten or wasn't listening when it was announced. He ended up throwing a fit in class when he wasn't allowed to leave class.