High Crystal is a science fiction/secret agent novel by Martin Caidin that was first published in 1974. It was the second sequel to Caidin's 1972 work Cyborg, which in turn was the basis for the television series The Six Million Dollar Man. Although published after the start of the television series, the book does not share continuity with it.

High Crystal
First edition
AuthorMartin Caidin
LanguageEnglish
SeriesCyborg a.k.a. The Six Million Dollar Man
GenreScience fiction novel
PublisherArbor House
Publication date
1974
Publication placeUnited States
Media typePrint (Hardback & Paperback)
Preceded byOperation Nuke 
Followed byCyborg IV 

Plot summary

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Steve Austin, an operative for the US government who is part man, part machine, is sent to Peru to investigate a mysterious power source in the ruins of an ancient civilization, but Austin and his team soon discover that a criminal organization also has their sights set on obtaining the power contained within the "High Crystal".