Shami Chakrabarti (@libertyhq) in conversation

Shami Chakrabarti joined Liberty the day before the 9/11 attacks. As the political climate shifted, and governments talked of a war on terror, many commentators became alarmed that civil rights were in danger of being eroded in the name of national security.

In her new book, On Liberty, Chakrabarti draws on her work on high profile campaigns – including those against ID cards, 42-day detention and imprisonment of foreign terror suspects without trial – to highlight the threats to our democratic institutions and why our fundamental freedoms are essential to our democracy. She will be in conversation with Guardian columnist Zoe Williams.