The Marriage of Heaven and Hell was created early in Blake's series of illuminated books, each of which was presented by him as an attractive work of art made entirely by his own hand. Written principally in prose, The Marriage represents Blake's first full-scale attempt to present his philosophic message. In it he expresses his extreme humanist views through a system in which Angels and Devils change places, Good becomes Evil, Heaven is Hell. The 27 colour plates are the work of Blake himself, with commentary and introduction by Sir Geoffrey Keynes.