George Platt Brett, Sr.
George Platt Brett, Sr. was a Britishborn chairman and publisher of the American division of Macmillan Publishing. He was best known for serving as publisher, friend, and mentor of American author Jack London. Under Bretts leadership, Macmillan became one of the largest publishers in America. Sales grew from 50,000 in 1890 and grew to 8.5160million in 1931. In 1931, Macmillan annuals produced between 600 and 700 titles.
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Source: Wikipedia