- Series: Underseas Series Record # 1853
- Series Tags: science fiction (1), juvenile sf (1), young-adult sf (1)
- Underseas
- Secret Under the Sea (1960) by Gordon R. Dickson
- Secret Under Antarctica (1963) by Gordon R. Dickson
- Secret Under the Caribbean (1964) by Gordon R. Dickson
- Secrets of the Deep (1985) [O/3N] by Gordon R. Dickson