Here are some Armchair Fiction titles I picked up during a sale, all of which are (though POD editions) either first editions thus or first book editions of works originally published in magazines, and are mostly works that have fallen out of copyright.
Anderson, Poul. Masters of Science Fiction, Volume 9: Poul Anderson: “The Star Beast” And Other Tales. Armchair Fiction, 2014. First edition trade paperback original, a Fine copy. Short story collection. “The Long Return” and “World of the Mad” haven’t been reprinted since their original magazine appearances.
Anderson, Poul with Lester Del Rey and Frederik Pohl. A Twelvemonth and a Day b/w Preferred Risk. Armchair Fiction, 2016. First edition trade paperback original for the Anderson, a Fine copy. Supplements a signed hardback first of Preferred Risk.
Campbell, John W. and Aladra Septama. When the Atoms Failed b/w The Dragons of Space. Armchair Fiction, 2016. First edition trade paperback originals, a Fine copy. Contains “When the Atoms Failed” (one print reprint) and “The Metal Horde” no print reprints) from Campbell, and the Septama had never been reprinted previously (though, according to Bleiler’s Science Fiction: The Gernsback Years, it’s really bad…).
Shaver, Richard S. The Shaver Mystery Book Eight. Armchair Fiction, 2020. First edition trade paperback original, a Fine copy. Supplements volumes 1-7.
Silverberg, Robert. Masters of Science Fiction Volume 13: Robert Silverberg The Ace Years, Part Three. Armchair Fiction, 2018. First edition trade paperback originals, a Fine copy. Reprints three more Ace PBOs: Invaders From Earth, Collision Course and The Silent Invaders, plus a new forward, a book cover gallery, and “The Songs of Summer.”
Silverberg, Robert, and Randall Garrett, and Laurence Manning. The Beast With 7 Tails b/w The Wreck of the Asteroid. Armchair Fiction, 2021. First edition trade paperback original, a Fine copy. The Silverberg/Garrett “The Beast With 7 Tails” has never been reprinted since it’s appearance in Amazing Stories in 1956, and The Wreck of the Asteroid has not been reprinted since being serialized in Wonder Stories in 1932-3. Bleiler’s Science Fiction: The Gernsback Years says that the Manning is “A competent adventure story with reasonable development.”
Except for The Ace Years, Part Three (already sold!), I will have copies of all these available in the next Lame Excuse Books catalog, currently in progress.