Martin Oliver
- Agent Arthur's Jungle Journey (Usborne Puzzle Adventures, #8)
- Agent Arthur's Arctic Adventure
- Agent Arthur's Desert Challenge
- Agent Arthur's Puzzle Adventures
- Usborne Puzzle Adventure Omnibus
- The Intergalactic Bus Trip
- Search for the Sunken City
- Agent Arthur on the Stormy Seas (Usborne Puzzle Adventures, #9)
- Usborne Puzzle Adventure Omnibus