The winner of the first Cock Robin Mystery Award also introduces Trygve Yamamura whose knowledge of judo and Japanese weapons enables him to solve the murder of a man by a Muramasa sword. A valuable process appropriated from another and developed in a metallurgical laboratory makes the members here suspect- and San Francisco is the melting pot for some mixed types and motives. The accent is on the accessories, from Samurai swords to Zen.