The Secret of the Martian Moons
Back to Mars! At long last – after four years of interplanetary study on Earth – Nelson Parr stepped aboard the Mars-bound space liner that was to carry him to his home planet. By the year 2120, Earth had established a colony on Mars and had explored the land – originally inhabitated by Martians, a weird yet intelligent people...
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Donald A. Wollheim
Donald Allen Wollheim (1914–1990) was an American science fiction editor, publisher, writer, and fan. As an author, he published under his own name as well as under pseudonyms, including David Grinnell.
A founding member of the Futurians, he was one of the leading influences on the development of science fiction and science fiction fandom in the 20th century United States.
