You can find more by following the links from David Salomon's home page and the Ecole Initiative. The Cloud of Unknowing One of the four great English Christian Mystics of the Fourteenth Century. Unlike many of the others you read, the anonymous author does not aim his message at everyone. The symbol of the Cloud of Unknowing does not refer to the Web Hall, but to the gap between man and God. The starting place for many who have an academic interest in mysticism and spirituality.
Mysticism is a good place to start.
If you lack time, read the original 1911 preface, the Preface to the twelfth edition. The Mystic Way , Practical Mysticism , Mystics of the Church , and Worship . She says that mystics are practical and realistic. Go to the bibliography section for an excellent list of secondary sources on mysticsism. Dr. Ellington has a Ph.D. from Duke University in History.