Apocalyptic, revolutionary, visionary, and lyrical -- these words all describe the imagination of William Blake. One of the most gifted rebels of the Romantic era, Blake was an accomplished poet, painter, experimental engraver, and philosopher. In particular, the series of illuminated books he created from the 1780s onward remains one of the most heroic achievements of British Romanticism. This book examines Blake's stupendous achievement by discussing and displaying some fifty works out of the Paul Mellon collection at the Yale Center for British Art. These include a number of Blake's illuminated books of poetry -- the pastoral Songs of Innocence, the prophetic Songs of Experience, Book of Urizen, Book of Thel, and America a Prophecy, as well as plates that comprise the unique, hand-colored copy of Jerusalem, the Emanation of the Giant Albion, Blake's master synthesis of visual imagery and prophetic verse. Blake's work in other media is represented by tempera paintings and watercolors from his series of illustrations to the Bible and a selection of watercolor illustrations to the Poems of Thomas Gray, which reveal the range and wit of Blake's genius at interpreting other poets' work and the brilliance of his mature watercolor technique. This book accompanies an exhibition of Blake's works celebrating the twentieth anniversary of the Yale Center for British Art from April 2 to July 6, 1997.