Egyptologist Bob Brier is the author of "The Murder of Tutankamen: A True Story" (Putnam) about his search for the killer of King Tut, using forensic evidence. Brier also hosts The Learning Channel's series "The Great Egyptians." He's also the author of several books: "Ancient Egyptian Magic," Egyptian Mummies," and "Encyclopedia of Mummies." Brier's speciality is paleopathology: the study of disease in the ancient world. He is a professor of philosophy at the C.W. Post campus of Long Island University.