Writing on the Wall: Disappeared Booksellers and Free Expression in Hong Kong provides the most comprehensive account to date of the disappearance of five Hong Kong booksellers in late 2015, and gives special attention to the worrying cases of booksellers Gui Minhai and Lee Bo, both foreign nationals who were seized by Chinese agents across borders—in Thailand and Hong Kong, respectively—in violation of international law. This unprecedented action reflects a dangerous escalation of China’s tactics to silence dissidents even beyond its borders.