1861 books

The Kitáb-i-Íqán (, ) is a book written by Baháʼu'lláh, the founder of the Baháʼí Faith. It is the religion's primary theological work and one of many texts that Baháʼís hold sacred. It is considered the second most important book in the Baháʼí writings, with the most important being the Kitáb-i-Aqdas. One Baháʼí scholar states that it can be regarded as the "most influential Quran commentary in Persian outside the Muslim world," because of its international audience.

book by Allan Kardec

non-fiction work by John Stuart Mill arguing for representative democracy as the ideal form of government

19th-century hoax manuscript

non-fiction work by Henry James Sumner Maine

medical book by Ignaz Semmelweis