The Letters consists of the most important letters, and those having the most general interest, written by Bediuzzaman Said Nursi to his students between 1926 and 1932. The letters, arranged by the author, were written in response to his student's questions and to reply to those who had adopted anti-Islamic viewpoints and ideas. The author discusses, among many other subjects, life, Paradise and Hell, how the Qur'an and science view nature, divine unity, knowledge and love of God; and the advantages and risks of following a spiritual order.