In 1920, Jaeger began writing for
Time and Tide, a feminist journal, and
Vogue before setting out on an independent writing career. Jaeger's four novels dealt with such topics as
extrasensory perception,
utopian speculation, and
genetic engineering and are considered important for their place in the history of science fiction. Her first
science fiction novel,
The Question Mark, was published in 1926, depicting a protagonist who woke after many generations to find himself in a seemingly utopian Britain of 200 years hence. Though critical response and limited sales ultimately led her to stop publishing, Jaeger made her mark with dynamic critiques of modern Western civilization and brought a unique voice to the struggles of subjectivity and scientific reason that shook the post-Victorian mindset. Jaeger continued her writing career beyond fiction. She wrote plays including
The Sanderson soviet; a comedy in three acts (1934). She also wrote many non-fiction books including popular history and biographies such as
Sisyphus: Or, the Limits of Psychology (1929),
Experimental lives from Cato to George Sand (1932),
Wars of Ideas (1942),
Liberty versus equality (1945), ''Shepherd's trade
(1965), and Before Victoria : changing standards and behaviour, 1787-1837'' (1967). Jaeger never married and died in
Tunbridge Wells,
Kent, in November 1969. ==Works==