Besides the larger attractions, this unusual guide presents Berlin's other side - such as a tower so ugly that no-one wants to open a restaurant in it; a library offering its books in the trunks of living trees; the monument for the inventor of the currywurst; a residential settlement in a former East German prison; the place where the Nazis concealed the so-called "degenerate art" which they had confiscated; the house where David Bowie lived; an...