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Star Trek: The Eugenics Wars is a trilogy of novels by Greg Cox explaining the Eugenics Wars, as well as the life and times of Khan Noonien Singh.

• The Rise and Fall of Khan Noonien Singh, Volume 1
• The Rise and Fall of Khan Noonien Singh, Volume 2
• To Reign in Hell: The Exile of Khan Noonien Singh

Although the third novel does not include Star Trek: The Eugenics Wars in its title, it is generally considered, due to its common authorship and story elements, to be the third book of a trilogy.