Fifth Planet (1963) (with Fred Hoyle)
Rockets in Ursa Major (1969) (with Fred Hoyle)
Seven Steps to the Sun (1970) (with Fred Hoyle)
The Molecule Men (1971) (with Fred Hoyle)
2010: Living in the Future (1972)
Into Deepest Space (1974) (with Fred Hoyle)
The Incandescent Ones (1977) (with Fred Hoyle)
The Westminster Disaster (1978) (with Fred Hoyle)
The Energy Pirate (1982) (with Fred Hoyle)
The Giants of Universal Park (1982) (with Fred Hoyle)
The Frozen Planet of Azuron (1982) (with Fred Hoyle)
The Planet of Death (1982) (with Fred Hoyle)

The Molecule Men and the Monster of Loch Ness (1971) (with Fred Hoyle)