Shmuel "Mooki" Katz (Hebrew: שמואל "מוקי" כץ 9 December 1914 – 9 May 2008[1]) was an Israeli writer, historian and journalist.

[2] Prior to the formation of the State of Israel, he was a Zionist activist and member of the high command of Irgun, a proscribed paramilitary group.

In 1936, Katz immigrated to Mandatory Palestine as the secretary of Michael Haskel, the South African honorary consul.

[10] Menachem Begin writes in "The Revolt" that Katz "was the officer responsible for Jerusalem until the dissolution of the military regiments of the Irgun Zvai Leumi.

[15] Katz's Battleground: Fact and Fantasy in Palestine describes the roots of the Arab–Israeli conflict and claims to refute anti-Zionist myths and Arab propaganda.