author
Best known for the Jean Craig books, this mid-century writer brought nursing school, family life, and young adulthood together in warm, readable stories for younger readers. Her novels have a practical, everyday feel that still makes them an interesting glimpse of girls' fiction in the late 1940s and early 1950s.

by Kay Lyttleton

by Kay Lyttleton

by Kay Lyttleton

by Kay Lyttleton
Kay Lyttleton was the pen name of Jean Lyttleton McKechnie. The clearest catalog evidence links the two names directly, and Project Gutenberg lists Kay Lyttleton alongside McKechnie, Jean L. (Jean Lyttleton).
She wrote juvenile fiction and appears to have been most active in the 1940s, with the Jean Craig series as her best-known work. Titles confirmed in that series include Jean Craig Grows Up, Jean Craig in New York, Jean Craig Finds Romance, and Jean Craig, Graduate Nurse, which was originally published in 1950.
Because reliable biographical details about her life are scarce in the sources I found, it is safest to remember her mainly through the books themselves: friendly, career-minded stories centered on a young nurse and her family, written for mid-century readers and still preserved today through public-domain and audiobook projects.