The Long Loneliness is the autobiography of Dorothy Day, published in 1952 by Harper & Brothers.

In the book, Day chronicles her involvement in socialist groups along with her eventual conversion to Catholicism in 1927, and the beginning of her newspaper the Catholic Worker in 1933.

[1] A 1952 review in The New York Times focused on her interactions with communism and her journey away from it while staying true to her radical roots: "This book will not shock anybody.

It may touch many, whatever their secular or religious faith, who lament the kindliness and sympathy that Communists found among certain left-wing groups -- and betrayed.

This article about a biographical or autobiographical book on Catholic personalities is a stub.