Summary and Info
Sir Claud Amory has discovered the formula for a new powerful explosive, which is stolen by a member of his household. Locking everyone in the library, Sir Claude switches off the lights to allow the thief to replace the formula. When the lights come on, he is dead. Hercule Poirot investigates.
More About the Author
Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (née Miller; 15 September 1890 – 12 January 1976) was an English crime novelist, short story writer and playwright.
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