Task: Question Generation
Input (English): Context : Operation Nuke is the title of the second book in the Cyborg series of science fiction/secret agent novels by Martin Caidin which was first published in 1973, just prior to Cyborg being adapted as the television series The Six Million Dollar Man. 
Subject : Operation Nuke 
Relation : series
Output (English): Of what series is Operation Nuke a part of?