On June 20, police raided a house in the capital, Luanda, and arrested 16 young people – covered their heads with hoods and drove them away to prison where they’ve been held ever since. Their crime? They were part of a book club, reading a book by Gene Sharp called "From dictatorship to democracy". Hip hop producer Cavera Tribo Sul knows many of those who were arrested. Amandla’s Terna Gyuse spoke to him in Luanda.