Lucifer and the Child by Ethel Mannin.
Cover art by Ley Kenyon.
First published 1945; cover shown is an undated early edition Arrow Books (UK) paperback.
Ethel Mannin (1900 - 1984) was a prolific British novelist and travel writer. A left-wing writer who wrote from a consistently Marxist-humanist point of view, she supported anarchism and had well-publicised affairs with W. B. Yeats and Bertrand Russell.