Against a Darkening Sky was originally published in 1943. Set in a semirural community south of San Francisco, it is the story of an American mother of the mid-1930s and the sustaining influence she brings, through her own profound strength and faith, to the lives of her four growing children.

Scottish by birth, but long a resident of America, Mary Perrault is married to a Swiss-French gardener. Their life in South Encina, though anything but lavish, is gay, serene, and friendly. As their children mature and the world outside, less peaceful and secure than the Perrault home, begins to threaten the equilibrium of their tranquil lives, Mrs. Perrault becomes increasingly aware of a moral wilderness rising from the physical wilderness which her generation has barely conquered.

Her struggle to influence, while not invading the lives of her children, is the focus of this novel of family life during the Depression years.