Travel to the Scotland Highlands with this classic Hamish Macbeth cozy mystery from the author of the Agatha Raisin series. Death of a Poison A Hamish Macbeth Mystery When the residents of Lochdubh begin receiving poison pen letters, no one takes them seriously. But Constable Hamish Macbeth fears them, and his instincts prove correct when the postmistress is found hanging from a rope with a vicious poison pen letter at her feet.