There are few works like this. The Anglo-Saxon Chronicle is perhaps the sole greatest written work to tell the history of England during the "Dark Ages." Bede's histories also compare nicely. But this work is brilliant, and covers everything from the ethnic identities of different people in England to the conversion of the various peoples to Christianity, from the wars with the Vikings to the supersititions of the time.
Like the Royal Frankish Annals, a comparable work from medieval France and Germany, this chronicle covers the history of a people year by year, telling the important events of each year. Anyone interested in Vikings, Anglo-Saxon England, or the Celts should study this text.
The translation also is solid, and so far, holds up to the best of my knowledge regarding the original manuscripts. Footnotes also help clarify points of vaguery.