From Our Catalog:
A princess of Mars by Edgar Rice Burroughs (1914)
Book description: Ex-confederate army captain John Carter finds himself unwittingly transported to Mars, while fleeing Apache Indians. This new world is populated by a race of monstrous Martians, whose culture is based on the ability to fight for their race. Fortunately for John, the gravitational difference between Mars and Earth has endowed him with the strength that he will need for survival on this hostile planet. John Carter battles ferocious Martian creatures, but gains the respect and friendship of the Barsoomians. He also encounters the beautiful Dejah Thoris, Princess of Helium, and earns her everlasting devotion.