"The Book of Urizen" is a poem by William Blake, published in 1794. It is part of Blake's larger body of work known as the Songs of Experience and explores themes of creation, authority, and the nature of existence. The narrative follows the character Urizen, who represents reason and law, contrasting with the more imaginative and free-spirited figures in Blake's mythology. The poem is illustrated with Blake's own engravings, which enhance its symbolic meaning. Through its complex imagery and allegorical content, "The Book of Urizen" critiques the constraints of rationalism and the oppressive structures of society, reflecting Blake's broader philosophical and artistic vision.