what does it deals with?
The magazine featured writing by some of the most important writers in the United States.
The American Mercury
 The magazine featured writing by some of the most important writers in the United States through the 1920s and 1930s. 
who is the author of venture science fiction? It was an American digest-size science fiction magazine. when was it published? From 1957 to 1958. which company or organization used to publish it? Lawrence E. Spivak. which were the editions it had? British and Australian editions. what do you know about the above publisher? It appeared from Atlas Publishing and Distributing Limited, a London-based publisher. any other work of the person you mentioned above? The American Mercury. what is it actually? Its a magazine.
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The American Mercury [SEP] Introduction
The American Mercury was an American magazine published from 1924 to 1981. It was founded as the brainchild of H. L. Mencken and drama critic George Jean Nathan. The magazine featured writing by some of the most important writers in the United States through the 1920s and 1930s. After a change in ownership in the 1940s, the magazine attracted conservative writers, including William F. Buckley. A second change in ownership in the 1950s turned the magazine into a far-right and virulently anti-Semitic publication. It was published monthly in New York City. The magazine went out of business in 1981, having spent the last 25 years of its existence in decline and controversy.