The Marriage of Heaven and Hell This book is a series of texts written in imitation of biblical prophecy but expressing Blake's own intensely personal Romantic and revolutionary beliefs. It was published as printed sheets from etched plates containing prose, poetry and illustrations. It is written in prose, except for the opening Argument and the Song of Liberty. The book describes the poet's visit to Hell. It also tells that good and evil are different kinds of energies, and both are needed to keep the world going.