The Conspiracy Against the Human Race

No book-club edition is documented. The reprint tells are straightforward and largely ISBN-based: Hippocampus's own 2011 softcover (978-0-9844802-7-2) and the 2018 Penguin paperback (978-0-14-313314-8) are both later, and the Penguin is further identified by its added preface. On a Hippocampus hardcover, a number line no longer descending to 1 indicates a later printing.