Walter Karig
Karig, Walter Robert
November 13, 1898 – September 30, 1956 (aged 57)
Birth place: New York City, New York, USA
Karig wrote juvenile series books for the Stratemeyer Syndicate (none in the database 2023), including 1932/33 Nancy Drew mysteries #8-10 under house name . Uniquely he identified himself to the Library of Congress (see archive.org), but his name did not become public until 1980 or so, and LC online catalog does not credit him today. --Wikipedia and its sources