The Atlas Six

Self-published US precedes; the census claim is correct. The self-published POD paperback (30 January 2020) is the earliest issue. Tor Books' ebook reissue followed on 28 September 2021, and Tor's hardcover on 1 March 2022 (ISBN 9781250854513, 376 pp) is a REVISED and re-edited text with new illustrations by Little Chmura — the author's own FAQ states "The revised version with new illustrations by Little Chmura will release March 1, 2022" — so the Tor hardcover is a first thus of a revised text, not the first edition. The first UK issue is Tor UK / Pan Macmillan, ISBN 9781529095234, 2022. Both the self-published 2020 issue and the 2022 Tor hardcover are collected, for different reasons: the former as the true first, the latter as the first hardcover and first appearance of the revised text.