Martin Luther wrote of this 14th century devotional work that next to the Bible and St. Augustine, no other book has come to my attention from which I have learned - and desired to learn - more concerning God, Christ, man and what all things are. Theologica Deutsch - the title this work has most commonly appeared under - has been through 190 editions in ten languages throughout its 600-year history. Now drawing on the new German critical edition of the work, David Blamires brings us the definitive English translation of this classic mystical work, The Book of the Perfect Life.