CHAPTER I. The Message
CHAPTER II. Into Space
CHAPTER III. Out of Control
CHAPTER IV. The Return to the Dark Moon
CHAPTER V. A Desperate Act
CHAPTER VI. "Six to Four"
CHAPTER VII. The Red Swarm
CHAPTER VIII. Doomed
CHAPTER IX. A Premonition
CHAPTER X. A Mysterious Rescuer
CHAPTER XI. The Sacrificial Altar
CHAPTER XII. In the Shadow of the Pyramid
CHAPTER XIII. Happy Valley
CHAPTER XIV. A Bag of Green Gas
CHAPTER XV. Terrors of the Jungle
CHAPTER XVI. Through Air and Water
CHAPTER XVII. Hunted Down
CHAPTER XVIII. Besieged!
CHAPTER XIX. "One for Each of Us"
CHAPTER XX. On to the Pyramid
CHAPTER XXI. The Monstrous Something
CHAPTER XXII. Sacrifice
CHAPTER XXIII. The Might of the "Master"