Cover art: Mars of pulp author Otis Adelbert Kline

The blog Golden Age Comic Book Stories has scans of the covers of two classic Martian science fiction novels written by Otis Adelbert Kline and originally published as serials in Argosy magazine in the early 1930s:

• The Swordsman of Mars, First Edition, hardcover (Avalon, 1960)

• The Swordsman of Mars, paperback (Ace, 1961)

• The Outlaws of Mars, First Edition, hardcover (Avalon, 1961)

• The Outlaws of Mars, paperback (Ace, 1968)

Otis Adelbert Kline, a contemporary of Edgar Rice Burroughs, is often considered an ERB knock-off, but Michael Moorcock’s introduction to the recent unabridged reprint of The Swordsman of Mars (2008, Paizo Publishing), restores Kline to his proper place in the history of SF.

Thanks to Dave Tackett of the blog QuasarDragon for the link to the Kline scans.

Pictured: Dust jacket of a First Edition of The Swordsman of Mars. Artwork by Ed Emshwiller.