# The Secret of the Ninth Planet

Author: Wollheim, Donald A., 1914-1990

Genre: Science Fiction

Language: English

License: Public domain

Source: https://www.gutenberg.org/ebooks/33644

Amazon editions: https://www.amazon.com/s?k=The+Secret+of+the+Ninth+Planet+Wollheim&tag=cyberlibrar00-20

## Summary

On the morning that the theft of the solar system's sunlight began, Burl Denning woke up in his sleeping bag in the Andes, feeling again the exhilaration of the keen, rarefied, mountain air. He glanced at the still sleeping forms of his father and the other members of the Denning expedition, and sat up, enjoying the first rays of the early morning.

## Chapters

- [Chapter 19. _The Museum of Galactic Life](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/19/index.md)
- [Chapter 17. _Stronghold of the Lost Planet](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/17/index.md)
- [Chapter 4. _The Hidden Skyport](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/4/index.md)
- [Chapter 7. _Hot Spot on Mercury](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/7/index.md)
- [Chapter 1. _Special Delivery--by Guided Missile](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/1/index.md)
- [Chapter 6. _Sunward Ho!](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/6/index.md)
- [Chapter 12. _At Rope's End](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/12/index.md)
- [Chapter 11. _Martians Don't Care](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/11/index.md)
- [Chapter 2. _The Valley of Stolen Sunlight](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/2/index.md)
- [Chapter 18. _Sacrifice on the Sacred Moon](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/18/index.md)
- [Chapter 3. _The Secret of A-G 17](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/3/index.md)
- [Chapter 13. _The Pole of Callisto](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/13/index.md)
- [Chapter 14. _Rockets Away!](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/14/index.md)
- [Chapter 10. _The Dying Planet](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/10/index.md)
- [Chapter 16. _In Orbit Around Pluto](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/16/index.md)
- [Chapter 5. _Up the Rope of Space](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/5/index.md)
- [Chapter 9. _The Ocean Primeval](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/9/index.md)
- [Chapter 8. _The Veil of Venus](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/8/index.md)
- [Chapter 15. _Ice Cold on Oberon](https://www.cyberlibrary.org/en/books/the-secret-of-the-ninth-planet-33644/chapters/15/index.md)