The first survey of its kind based on ancient manuscripts from Dunhuang and told in a modern Tibetan voice, this book starts with an examination of the dynasty's prehistoric origins and then proceeds to trace the line of Pugyal tsenpo, or emperors, from the founding emperor Nyatri Tsenpo in the 5th century BC, until the empire's collapse in the 9th century AD following the assassination of the last emperor Uidum Tsenpo (Lang Darma).