During World War 1, Agatha Christie volunteered to be a nurse and spent a lot of time in the hospital dispensary. She later became an apothecary’s assistant, where she handled pills and lotions every day and learned which concoctions were deadly. This training served her well in later life when she wrote her novels; she was able to give her characters access to innocent-looking plants or household chemicals that could be used for fatal consequences. Her high level of underst