When Six Americans Defeat an Invading Army: Robert A. Heinlein’s Sixth Column
Sixth Column by Robert A. Heinlein. First Edition:
Gnome Press, 1949. Cover by Edd Cartier
Sixth Column
by Robert A. Heinlein (Gnome Press, 1949, 256 pages, $2.50 in hardcover; serialized earlier in Astounding Science Fiction, January-March 1941)
Sixth Column was the earliest novel-length work by Robert A. Heinlein, though it was serialized in Astounding magazine (Jan, Feb, and March 1941, under the pseudonym Anson MacDonald) and not published in book form until 1949, by which time three or four other Heinlein novels had been published as books (Rocket Ship Galileo (1947), Beyond This Horizon (1948), Space Cadet (1948), and perhaps Red Planet, also 1949).
First published in hardcover by Gnome Press under the magazine title Sixth Column (adding the subtitle “A Science Fiction Novel of Strange Intrigue”) it was reprinted for many years in paperback by Signet under the blander title The Day After Tomorrow (a 7th printing with a Gene Szafran cover is shown below, along with the 2012 Baen edition I’ve read for this review). The book isn’t long; 174 pages in the Baen edition, 144 with Signet’s tinier print.