Tower of the Medusa is a sword and planet science fiction novel by American writer Lin Carter, the third in his Tales of the Near Stars series. It was first published in paperback by Ace Books in November 1969 together with the unrelated George H. Smith novel Kar Kaballa as the "Ace Double" anthology, Kar Kaballa/Tower of the Medusa. The first stand-alone edition was issued in trade paperback and ebook by Wildside Press in February 2011. The first British edition was issued as an ebook by Gateway/Orion in November 2018.