- The forgotten doorAlexander Key
- Escape to Witch MountainAlexander Key
- Return from Witch MountainAlexander Key, Malcolm Marmorstein
- Sprockets, a little robotAlexander Key
- Rivets and sprocketsAlexander Key
- Bolts, a robot dogAlexander Key
- The magic meadowAlexander Key
- The incredible tideAlexander Key
- The Case of the Vanishing BoyAlexander Key
- The golden enemyAlexander Key
- Flight to the lonesome placeAlexander Key
- The preposterous adventures of SwimmerAlexander Key
- The wrath and the windAlexander Key
- Jagger, the dog from elsewhereAlexander Key
- The book of dragonsFuller, Muriel, Alexander Key et al.
- Island lightAlexander Key
- The strange white dovesAlexander Key
- The sword of AradelAlexander Key
