- We shall return
- The vanishing
- The search begins
- Buried treasure
- Blank spots on the map
- The disciple
- Freeze-dried ice cream and adrenaline socks
- Into the Amazon
- The secret papers
- The green hell
- Dead Horse Camp
- In the hands of the gods
- Ransom
- The case for Z
- El Dorado
- The locked box
- The whole world is mad
- A scientific obsession
- An unexpected clue
- Have no fear
- The last eyewitness
- Dead or alive
- The colonel's bones
- The other world
- Z.