Moore and Kuttner married in 1940 and thereafter wrote many of their stories in collaboration, sometimes under their own names, but more often using the joint pseudonyms C. H. Liddell, Lawrence O'Donnell, or Lewis Padgett — most commonly the latter, a combination of their mothers' maiden names. Moore still occasionally wrote solo work during this period, including the frequently anthologized "No Woman Born" (1944). A selection of Moore's solo short fiction work from 1942 through 1950 was collected in 1952's "Judgement Night". Moore's only solo novel, "Doomsday Morning" appeared in 1957.