6Chapter 6: The Sandstorm Surprise
18Chapter 19: The Choice
7Chapter 7: Hidden Messages
19Chapter 20: The Heart of the Cube
8Chapter 9: The Martian Time Machine
20Chapter 21: The Ancient Network
9Chapter 10: Martian Robots
21Chapter 22: Beyond the Stars
10Chapter 11: Teamwork and Trouble
22Chapter 23: The Uncharted System
11Chapter 12: The Maze of the Martian Caverns
23Chapter 24: The Infinite Gateway
12Chapter 13: The Alien Message
24THE END
