Zac Hobson is a fictional character from the novel "The Quiet Earth," written by Craig Harrison. He is portrayed as a scientist who wakes up to find himself seemingly the last person on Earth after a mysterious event. The story explores his psychological struggles and attempts to understand what has happened. In the narrative, Zac grapples with isolation and the search for meaning in a desolate world. His character reflects themes of loneliness and the human condition, making him a compelling figure in post-apocalyptic literature. The novel has gained recognition for its thought-provoking exploration of these themes.