Thirteen American scholars say they have been barred from traveling to China because of a book they wrote, an incident that raises awkward questions about academic freedom at a time of unprecedented collaboration between U.S. and Chinese universities.
The academics have taken to calling themselves the Xinjiang 13 to emphasize their shared misfortune. Seven years ago, they assembled a book about Xinjiang, a vast region of western China that has a large Muslim population and an occasionally violent separatist movement.
