The Mysterious Affair at Styles (Hercule Poirot Series)
by Agatha Christie
Captain Arthur Hastings, invalided in the Great War, is recuperating as a guest of John Cavendish at Styles Court, the 'country-place' of John's autocratic old aunt, Emily Inglethorpe. When Emily's sudden heart attack is found to be attributable to strychnine, Hastings recruits an old friend, now retired, to aid in the local investigation. With impeccable timing, Hercule Poirot, the famous Belgian detective, makes his dramatic entrance into the pages of crime literature.