On this edition of Conversations, Deborah Blum talks about her latest book, The Poison Squad: One Chemist’s Single-Minded Crusade for Food Safety at the Turn of the Twentieth Century. Blum is the director of the Knight Science Journalism Program at MIT, and editor of Undark magazine. In 1992, she won the Pulitzer Prize for a series on primate research, which she turned into a book, The Monkey Wars. Her other books include The Poisoner's Handbook, Ghost Hunters, Love at Goon Park, and Sex on the Brain.