JAMES ESSINGER is an established author of narrative non-fiction books focusing on STEM subjects and personalities. These include Ada's Algorithm: How Lord Byron's Daughter Launched the Digital Age Through the Poetry of Numbers. He lives in Canterbury. SANDRA KOUTZENKO is a bilingual writer whose work spans a variety of categories and topics, ranging from French poetry to English non-fiction, focusing on human nature and the conflict between its potential for greatness and its propensity for destruction.