<prompt> Translate the following text to SwahiliLocal columnists have pointed out a number of errors and unsubstantiated stories in Davis two books about Los City of Quartz 1990 and Ecology of Fear 1998.  <response>: Wahariri wa habari wa eneo hilo wamebainisha makosa kadhaa na hadithi zisizo na msingi katika vitabu viwili vya Davis kuhusu Los City of Quartz 1990 na Ecology of Fear 1998. 