The Gods of Mars by Edgar Rice Burroughs [Barsoom #2]

This Halcyon Classics ebook is the second in Edgar Rice Burroughs BARSOOM series.

Beginning with John Carter's return to Barsoom (Mars) after a ten year hiatus -- separated from his wife Dejah Thoris, his unborn child, and the Red Martian people of the nation of Helium, whom he has adopted as his own -- John Carter materializes in the one place on Barsoom from which nobody is allowed to depart: the Valley Dor, the Barsoomian heaven.