Abstract
It is not often that one can literally describe the critical edition of the work of a medieval philosopher as being exciting. After all, what could such an edition comprise, over and above a more exact version of an already-familiar text? In the present case, however, not only the content, but also the inception and execution of the project which comes to fruition in this edition have involved adventures and even tragedies, major and minor. The fact that there already exists an excellent preliminary detailed commentary on the material contained in this volume, thus lightening and heightening the pleasures of research in this area, is another feature in its favour.