CONTENTS
[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"]