Final Blackout

Census claim confirmed. The Hadley Publishing Co. edition (Providence, RI, 1948) is the true first book edition worldwide; no UK or other English-language edition precedes it, and there is no foreign-language original. Only the US edition is collected — there is no competing UK first to name. The text's true first appearance is the three-part serial in Astounding Science-Fiction (1940), but that is a magazine appearance, not a book edition, and the Hadley adds new prefatory matter by Hubbard.