Michael Z. Williamson (born 1967) is an American military science fiction and military fiction author best known for his libertarian-themed "Freehold" series published by Baen Books. Between 2004 and 2016, Williamson published eight "Freehold" novels, exploring military and political themes as well as first contact with alien beings. This was followed by the "Forged in Blood" (2017) and "Freehold: Resistance" (2019) anthologies, consisting of short stories taking place in the "Freehold" universe, some by Williamson and some by other authors, including Larry Correia, Tony Daniel, Tom Kratman and Brad R. Torgersen.