A novelisation of this serial, written by Terrance Dicks, was published by Target Books in November 1975.
The novelisation provides a rationale for Omega's realm to be a quarry: over the millennia, Omega has become weary of the mental effort required to generate a verdant landscape and now makes do with rock and soil. The Second Doctor is referred to throughout as Doctor Two. In the book, Mr Ollis is renamed Mr Hollis.
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