When 22-year-old Jennifer Worth, from a comfortable middle-class upbringing, went to work as a midwife in the poorest section of postwar London, she not only delivered hundreds of babies and touched many lives, she also became the neighborhood's most vivid chronicler. Call the Midwife: Farewell to the East End is the last book in Worth's memoir trilogy, which the Times Literary Supplement described as "powerful stories with sweet charm and controlled outrage" in the face of dire circumstances.