What are the best (ie most revelatory) books on the Marc Dutroux case specifically, and on human/child trafficking on a broader level? I've already read Programmed to Kill and while it was really interesting I wish it had more to say about the Dutroux case. And as a quick aside I wonder what the relation may be between Dutroux/human trafficking and the disappearance of Madeleine McCann. Thx.