Remembered as one of science fiction's best editors, Judith Merril (1923-1997) also wrote prolifically and stands as one of the genre's central figures in the United States and Canada. This work offers a much-needed literary biography and critical commentary on Merril's groundbreaking science fiction, anthologies, reviews, memoir and other endeavors. A thorough account of Merril's 50-year career, it is a valuable source for students of science fiction, women's life writing, women's contributions to frontier mythology and women's activism.