Founded in 1944 by newspaper proprietor, Ezra Norton, Invincible Press was a trade publishing house producing popular literature titles - particularly crime thrillers and mysteries, romances and westerns - as well as comics and magazines. The magazines continued to be published after the press ceased functioning in circa 1955 and may have been taken over by a newspaper group. The Invincible Press thrillers were mostly reprints of works by American authors although the initial titles included some reprints of works by British authors. The Invincible list also includes some sixteen titles by eleven Australian authors. The thrillers and mysteries were issued at the rate of one per month until about 1955. The thriller and mystery series included a paperback series, True Crime; a paperback series, True Australian Crime, which included titles by authors such as Beatrice Grimshaw, Arthur W. Upfield and Dick Wordley; and a series known as The Thriller Club, which was issued from 1953 at a rate of two a month. Invincible Press also published the series, Invincible Westerns, which unlike the Invincible Mysteries series included many Australian authors; and the numbered series known as Invincible Romances.
Source: John Loder, Invincible Press Pulps, Melbourne, 2008.
