《黄色蝴蝶花：自然的绚烂与生命的希望》91秦

　　Exactly two years ago, in Buenos Aires, circumstances prevented Poirot from investigating the sudden death of the beautiful Iris Russell. Now he has the chance to try again, this time in London, when a yellow iris, mysteriously left on his doorstep, alerts Poirot that the killer may strike once more.