This issue of Index on Censorship celebrates 50 years of English PEN by looking at the impact that imprisonment and persecution has on literature -- and asking what challenges writers continue to face today. Contributors include Margaret Atwood, Lydia Cacho and Maureen Freel

The September 2011 issue of Index on Censorship focuses on the relationships between art, artists and censorship and features celebrated sculptor Anish Kapoor.

This issue of Index on Censorship looks at censorship in music, including the songs they tried to ban, the musicians stopped for playing live, and the singers who are put on trial. With contributions by Radiohead's Colin Greenwood, legendary band manager Peter Jenner and novelist Will Self.

Index marks its fortieth anniversary with a special issue marking the highs and lows for freedom of expression since the magazine was founded, and assessing the future for free speech.