Der Geheimagent
"The Secret Agent" influenced the Unabomber—Ted Kaczynski; he was a great fan and as an adolescent kept a copy at his bedside. He identified strongly with the character of "The Professor" and advised his family to read "The Secret Agent" to understand the character with whom he felt such an affinity. David Foster, the literary attributionist who assisted the FBI, said that Kaczynski "seem[ed] to have felt that his family could not understand him without reading Conrad".