This is a Cock Robin Mystery introducing Trygve Yamamura--judo expert, Samurai sword connoisseur and private detective--triple threat to San Francisco crime. These combined skills enable him to keep his own head attached while finding out who removed someone else's with honorable Japaneses weapon. This is a good old-fashioned detective story, a genuine whodunit, with a good deal of suspense thrown in. (Goodreads)
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