The Epistle to the Son of the Wolf is the last major work of Bahá’u’lláh written in 1891 just before his death in 1892. It addresses a Muslim cleric from Isfahan, Iran, whose father instigated the martyrdom of two noble young Bahá’ís. Although it is addressed to a specific cleric, it was intended for a larger audience, indeed it is a presentation of the Bahá’í Faith to all humanity. It contains the proofs establishing the validity of His Cause and quotes many of His previous works, including His letters to the reigning monarchs and rulers of the world.