"Pendulum" is a philosophical novel by the American writer Edgar Poe, which became an axiom of the hustle and bustle of the seventies for every reader. Visibly reaching deep into the consciousness of the characters, the author offers surprising reflections on the eve of the "Haskill Illusion", saying that you can never sit on two chairs. The novel tells about the search for one's own self in a world where the line between good and evil turns out to be thin and rather rotten. "Pendulum" is a book that is worth reading to understand extreme situations in human life and to find solutions that can become the key to one's own harmony.