BOOK EXTRACT: In Gao, a group of teenagers sat around a ghetto blaster listening to Bob Marley. A Landcruiser pick-up loaded with tooled-up Islamic police came by and seeing the reggae fans, stopped and accosted them. “This music is haram!” – forbidden by Islamic law – said one of the MUJAO men as he yanked the cassette out of the blaster and crushed it under his feet.