- Measuring Sarawak Chamber
- Finding the Whiterock River
- Garden of Eden, Mega doline or valley?
- Mulu, the largest caves in the world?
- Is the Clearwater System the biggest of them all?
- The Largest Passage on Earth
- The World's Largest Underground Chamber
- Re-finding Blackrock; Volume 1
- Re-finding Blackrock; Volume 2