A Princess of Mars

A Princess of Mars is a science fiction novel by Edgar Rice Burroughs, the first of his Barsoom series... Full of swordplay and daring feats, the novel is considered a classic example of 20th century pulp fiction. It is also a seminal instance of the planetary romance, a genre that became highly popular in the decades following its publication. Its early chapters also contain elements of the Western. The story is set on Mars [called "Barsoom"], imagined as a dying planet with a harsh desert environment. --Wikipedia.com.