Swords of Mars is a science fantasy novel by American writer Edgar Rice Burroughs, the eighth of his Barsoom series. It was first published in the magazine Blue Book as a six-part serial in the issues for November 1934 to April 1935. The first book edition was published by Edgar Rice Burroughs, Inc. in February 1936.
Lost On Venus is the second book in the Venus series by Edgar Rice Burroughs. It was first serialized in Argosy in 1933 and published in book form two years later.
Somewhere in South America, there is a plateau; and roaming in its forests are dinosaurs. Only one man has ever been there, and his reports are so astonishing that no-one is prepared to believe him; except the extraordinary Professor Challenger. He decides to take a trip to prove beyond doubt that this lost world …