This volume, beginning the new Scripta Mongolica Monograph Series, presents two remarkable documents—the letters of 1289 and 1305 from the Mongolian potentates Ilkhan Argun and Ilkhan Olje'itu to Philip the Fair of France. The texts and their implications are thoughtfully discussed with generous annotation. Both documents are fully reproduced in a sequence of excellent plates; the text is transliterated. These valuable materials, along with the volume's enlightening discussion, will be of great value to scholars in the field.