Volume Three of the now standard translation of the Secret History of the Mongols (Brill 2004, 2006) by Igor de Rachewiltz is the indispensable companion to the first two volumes with its updated commentary, numerous revisions and some challenging new interpretations.
The Secret History of the Mongols has been selected by Choice as Outstanding Academic Title (2005).

Igor De Rachewiltz, Ph.D. (1961), Australian National University, is Adjunct Professor and Research Associate in the School of Culture, History and Language of that university. A leading authority on the mediaeval Mongols and the Yuan Dynasty of China he is the author of numerous publications on Sino-Mongolistics, his major work being the annotated translation of the famous 13th century epic chronicle known as the Secret
History of the Mongols (Brill, 2004, 2006).