Arthur J. Rees is a past master in the art of fashioning ingenious mystery-detective yarns — and "The Moon Rock" is one of his best. The head of the House of Thurold is found dead in his study — murdered, apparently. The solution of the crime is inextricably entangled with vague and mystic occurrences. The author's many admirers will find keen enjoyment and many puzzling moments in their endeavors to solve the mystery.