Teasing John Carter (possibly of) Mars

I have a relatively new passion: the Mars novels written by Edgar Rice Burroughs, who is most famous for creating Tarzan. Burroughs wrote 11 books in the Mars series dealing with American Civil War veteran Capt. John Carter, who finds himself mysteriously transported to the planet Mars, where he becomes embroiled in a number of armed conflicts and a sweeping romance that takes him (literally) from pole to pole of the red planet its denizens call “Barsoom.” I recently devoured the first three books in the series (A Princess of Mars, The Gods of Mars and The Warlord of Mars) and am now reading the fourth, Thuvia, Maid of Mars.