The anonymous imperial chronicle by the so-called Annalista Saxo, which covers the years from 741 to 1139, and which was compiled between 1148 and 1152 (with additions made shortly thereafter), has long been acknowledged as a significant witness not simply to the history of the Saxons from the time of their conversion or from the rise of the Liudolfing Saxon dynasty in the tenth century, but also as a broader holistic history of the regnum Germaniae and/or regnum Teutonicorum which began with the rise of the Carolingian house in a Frankish empire, out of which emerged a new dynasty after the partition at Verdun in 843. This new edition of the Chronicle by Klaus Nass for the Monumenta Germaniae Historica replaces George Waitz's edition of 1844 for the MGH, which appeared as Scriptores vi. Nass's important earlier monograph on the Reichskronik, published in 1996, had definitively addressed the question of the Chronicle's authorship, partisan leanings and especially formal sources, and had noted that the Annalist drew on a quite phenomenal range of texts, including some fifty-odd historical/hagiographical works, thirty letters and acta, along with several charters and literary works. Nass had concluded there that this in no way made for a derivative, pieces-part chronicle, but rather one that was shaped by a vision of a unified ‘Germanic’ history of translatio from the Carolingians to the Saxons and beyond. This new edition, as one would expect from Nass's preparatory study and from the MGH, is a magisterial one, based on the surviving single manuscript of the Chronicle (Paris, Bibliothèque Nationale ms lat. 11851). It offers scholars and students alike a critical edition of this most important witness to Saxon historiography especially as it developed after the Saxon Rising of 1073 and the subsequent Investiture Contest. The edition includes an introduction with discussion of the text and its compiler, its sources and method of working, the manuscript and other transmission, a brief bibliography of primary and secondary literature and, finally, indices. The edition of the Reichskronik itself is meticulous with a full scholarly apparatus and explanatory notes. Overall, this is an excellent critical edition of an extremely important source that will not only set a high standard for other editions, but will be a vital part of medieval scholarship for many years to come.