When fourteen-year-old Carlotta Walls walked up the stairs of Little Rock Central High School on September 25, 1957, she and eight other black students only wanted to make it to class. But the journey of the "Little Rock Nine," as they came to be known, would lead the nation on an even longer and much more turbulent path, one that would challenge prevailing attitudes, break down barriers, and forever change the landscape of America.

For Carlotta and the eight other children, simply getting through the door of this admired academic institution involved angry mobs, racist elected officials,...