The Murder of Roger Ackroyd

First published in 1926 in the United Kingdom, The Murder of Roger Ackroyd is the third novel to feature Hercule Poirot as the lead detective, and in 2013, the British Crime Writers' Association voted it the best crime novel ever.
Roger Ackroyd was a man who knew too much. He knew the woman he loved had poisoned her first husband. He knew someone was blackmailing her-and now he knew she had taken her own life with a drug overdose. Soon the evening post would let him know who the mystery blackmailer was. But Ackroyd was dead before he'd finished reading it-stabbed through the neck where he sat in the study.
The only person who can unravel the terrible events is Hercule Poirot. He sets about, in his usual meticulous and eccentric way, to uncover the truth.
"A well-written detective story."
"No one is more adroit than Miss Christie in the manipulation of false clues and irrelevances and red herrings; and The Murder of Roger Ackroyd makes breathless reading from first to the unexpected last."