(From the publisher):
Eminent scientist Emil Keller has developed a revolutionary new process for the treatment of hardened criminals. His invention, the Keller Machine, is being heralded as a major scientific breakthrough.
But Professor Keller is in truth the Master and the Keller Machine is much more than a mere machine. Soon the Doctor is involved in a bitter struggle with his deadliest enemy, an alien mind parasite, and a diabolical scheme to plunge the world into a Third World War...
Novelization of the Doctor Who TV series; six episode story "The Mind of Evil" (1971), script by Don Houghton.
Original title: Doctor Who: The Mind of Evil
Genre: Fiction→ Science Fiction→ Shared Worlds