I will say that the illustrations are gorgeous. However, they are not of Mars/Barsoom. There are no giant size moons in the skies of Mars. John Carter often says that he misses the bright light of Earth's moon compared to the smaller Thuria (Phobos) and Cluros (Deimos) that race through the night sky. Also Jupiter…

"But even so, I’ve never personally witnessed best men and maids of honor who consider themselves failures if they don’t end up naked in a broom closet."