Author profile

Amy Butler Greenfield

Amy Butler Greenfield is a historian and author of A Perfect Red. Her writing explores the people behind major cultural and scientific developments.

Profile checked 16 October 2026

Suggest a correction

In the Read2027 guide

Coming in 2027

History11 May 2027 · US

Code Name Purple

Amy Butler Greenfield

Greenfield pairs the problem of a machine cipher with the human labor required to break it. The American team broadens the familiar wartime codebreaking narrative.

Publisher confirmedDetails