A is for Arsenic

Book excerpt: "Agatha Christie used poison to kill her characters more often than any other murder method, with the poison itself being a central part of the novel, and her choice of deadly substances was far from random; the chemical and physiological characteristics of each poison provide vital clues to discovery of the murderer. Christie demonstrated her extensive chemical knowledge in many of her novels, but this is rarely appreciated by the reader. 'A is for Arsenic' looks at why certain chemicals kill, how they interact with the body, and the feasibility of obtaining, administering and detecting these poisons, both at the time the novel was written and today."--Back cover.