Peril at End House
by Agatha Christie (Dodd, Mead and Company, 1932)
audiobook read by Hugh Fraser (Lamplight, 2014)
Christie does somewhat redeem herself at the denouement, but for the most part this mystery is just Poirot boasting insufferably about deductions that he never sees fit to reveal, and then berating himself for having been so mistaken. Hastings continues to irritate.