The Eugenics Wars, Vol. 2: The Rise and Fall of Khan Noonien Singh (Star Trek: the Original Series - the Eugenics Wars)

Alarmed by the potential dangers of the Chrysalis project, extraterrestrial secret agent Gary Seven teams up with human Roberta Lincoln to neutralize the growing threat of Khan Noonien Singh, an ambitious, teenage, artificially enhanced human who is determined to seize control of Earth. Reprint.