"It was definitely loopy and is the second of his novels I have read to deal sympathetically and sensibly with Asians in 1930s while everyone else was demonizing or eroticizing them in genre fiction of that era. This is one of Keeler's forays into the 'locked room' and impossible problem genre, but being Keller it involves an outrageous and nearly unfathomable solution." -- G. F. Norris, Golden Age Detection.