"Index of Ivan Fisk's Project Gutenberg Works" is a collection of works by the prominent American historian and philosopher Ivan Fisk. The book collects and digitizes his most significant works, which cover various aspects of history, philosophy and sociology. Fisk was considered one of the leading American explorers of the 19th century, and his writings are still a source of valuable information and wisdom. Thanks to this index, readers will have the opportunity to familiarize themselves with the in-depth analysis of Ivan Fisk and his outstanding works, which have become classics of world historiography.