Three StreetsThe always astonishing Yoko Tawada here takes a walk on the supernatural side of the street. In Kollwitzstrasse, as the narrator muses on former East Berlin's new bourgeois health food stores, so popular with the wealthy young people, a ghost boy begs her to buy him the old fashioned sweets he craves. She worries that sugar's still sugarbut why lecture him, since he's already dead? Then white feathers fall from her head and she seems to be turning