In this landmark, Civil War veteran John Carter is transported to a dying planet, where he must face giant green barbarians to rescue a Martian princess. Burroughs, best known as the creator of Tarzan, published this novel in 1911 and introduced a new style of writing that combined the genres of fantasy, adventure, and science fiction. Republication of the Chicago, 1917 edition.
Here's a sample of other books in this Dover category
At the Earth's Core by Edgar Rice Burroughs In a hair-raising adventure story that takes place hundreds of miles beneath the earth's surface, two explorers come upon the savage, primordial realm of Pellucidar.
Pellucidar by Edgar Rice Burroughs Two men tunnel to the Earth's core in a powerful drilling machine and discover a bizarre world populated by savage, prehistoric beasts, lovely maidens, and gallant heroes.