Renowned artist Ai Weiwei engaged nearly 900,000 visitors in a conversation about human rights with his art installation @Large: Ai Weiwei on Alcatraz. In one participatory piece, Yours Truly, visitors sent 92,829 postcards to prisoners of conscience around the world. This book delves into those postcards' lasting impact. Five former prisoners and their loved ones reflect on the experience of receiving hundreds of postcards while imprisoned. Essays and a statement by Ai Weiwei contextualize this extraordinary project. And photographs taken during the exhibition show visitors and the messages they wrote.