Secret of the Ages: UFOs from Inside the Earth. Brinsley Le Poer Trench. 1976

James Blish - The Star Dwellers - 1979 Sphere Science Fiction PB

Michael Crichton. The Terminal Man. Panther Sci-fi Thriller 1980

Seed of Light By Edmund Cooper Paperback Book 1960 Panther Vintage Sci-Fi

The Planet Buyer by Cordwainer Smith 1975 Vintage Science Fiction Sphere Books

THE MALACIA TAPESTRY by Brian Aldiss - Panther Science Fiction - 1978 Paperback

The Sentinel by Arthur C. Clarke, Panther Paperback 1985

The Dancer from Atlantis (Sphere Science Fiction) - Poul Anderson