Henry Petroski (1942—2023) was the Aleksandar S. Vesic Distinguished Professor Emeritus and professor emeritus of civil and environmental engineering at Duke University. He was the author of many books on engineering and design, including the classics To Engineer Is Human and The Pencil. Catherine Petroski is a photographer and the author of fiction and nonfiction books, including A Bride’s Passage. She lives in Durham, North Carolina, and Arrowsic, Maine.