This is an OPUS MAGNUS of profound erudition! An indispensable must have for any student of Gothic Art and Architecture. From sheathed shafts thrusting upwards penetrating groin vaults to the most scholarly look nto this seminal figure in the Middle Ages, this text has it all! While certainly not a light read, it is a and important and pivotal work in the scholarship of the beginning of the Gothic era. It should be more readily available.