Introduction: medieval ritual magic - what it is and why we need to know more about it. Part I Contexts, genres, images: English manuscripts of magic, 1300-1500 - a preliminary survey, Frank Klaassen; The Book of Angels, Rings, Characters and Images of the Planets: - attributed to Osbern Bokenham, Juris Lidaka; safe magic and invisible writing in the Secretum Philosophorum, John B. Friedman; a fragmentary German divination device - medieval analogues and pseudo-Lullian tradition, Elizabeth I. Wade; Visual art in two manuscripts of the Ars Notoria, Michael Camille. Part II Angelic knowledge - the Sworn Book and the Book of Visions: a 13th-century ritual to attain the beatific vision from the Sworn Book of Honorius of Thebes, Robert Mathiesen; John the monk's Book of Visions of the Blessed and Undefiled Virgin Mary, Mother of God - two versions of a newly discovered ritual magic text, Nicholas Watson; Plundering the Egyptian treasure - John the monk's Book of Visions and its relation to the Ars Notoria of Solomon, Claire Fanger; the devil's contemplatives - the Liber Iuratus, the Liber Visionem and the Christian appropriation of Jewish occultism.