There's a reason why Agatha Christie knew so much about poisons.

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Books and sources: —The Mysterious Affair at Styles by Agatha Christie —A is for Arsenic: The Poisons of Agatha Christie by Kathryn Harkup —"In a Dispensary" by Agatha Christie from the collection The Road of Dreams —Agatha Christie: A Biography by Janet Morgan —An Autobiography by Agatha Christie —Guardian Obituary: Rosalind Hicks by Janet Morgan —The Murder of Roger Ackroyd by Agatha Christie —Murder on the Orient Express by Agatha Christie —"Dame Agatha's Dispensary" by Eunice Bonow Bardell in Pharmacy in History, Vol. 26, No. 1 (1984)

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