ILLUSTRATIONS
| [Frontispiece] | ||
| "She tried to get farther into the cave" | [54] | |
| They were completely surrounded by the jungle | [57] | |
| Astro kept his blaster aimed at the monsters | [107] | |
| His eyes probed the jungle for further movement | [115] | |
| "Mr. Sinclair!" cried Tom, suddenly relieved | [161] | |
| The Solar Guard troops landed on the rim of the canyon | [189] | |
| Sinclair wasn't able to get clear in time | [210] |