The silence of the jungle is as terrifying as the noise. Conrad uses sound - the drums, the steam whistle, the voice of Kurtz - to build tension. The auditory landscape of the novel is incredibly detailed. A Heart of Darkness PDF allows you to focus on these sensory descriptions. The text is a masterclass in how to use sound to create atmosphere. It is a story that you can hear as well as see, a nightmare that engages all the senses.