My Public / Unpublished Books (2)

  • Industrial Revolution
    Industrial Revolution
    The story explains the concepts of vertical integration, horizontal integration, laissez-faire, and their impact on the Industrial Revolution in the United States.
    by Robert Zahn
  • The Mayan Civilization
    The Mayan Civilization
    A brief overview of the Mayan civilization, covering their achievements in math, astronomy, architecture, and engineering.
    by Robert Zahn
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