Edgar Rice Burroughs 
Thuvia, Maid of Mars [EPUB ebook] 
A Collection of Mars

Edgar Rice Burroughs created the well-known character Tarzan, as well as John Carter, the adventurer of Mars.
Warlord of Mars is the fourth volume in the Barsoom Series, telling the adventures of John Carter, a confederate veteran of the American Civil War, who finds himself mysteriously transported to Mars, called Barsoom by its inhabitants.
On Barsoom, Carthoris, the son of John Carter and Dejah Thoris, is deeply in love with Thuvia, the Princess of Ptarth. 
But she is already promised to another man, and on Barsoom, this type of engagement can’t be broken, except by death. 
What will Carthoris decide to do in order to be with the Princess he madly loves ?
You’ll discover it in this fourth volume of the Barsoom Series.