The author provides a hypothetical chronological framework for the circles and considers their origins and purpose, examining in particular their possible astronomical function. He then discusses each regional grouping of circles, describing their architectural types and the finds from excavations. Special attention is paid to Stonehenge and Avebury, the two best known and most spectacular rings.
Burl's book is a technical, academic treatment of the stone circles of the British Isles, and while i understood that when I picked it up, I wasn't prepared for how much archaeological, historical, and geographical knowledge would be required to understand it. While I'm somewhat familiar with British pre-history, and with the general geography of the island, I found that I needed more context in both areas than the book provides. Archaeologically speaking, the book assumes in-depth study of the field, and is really intended for a sophisticated audience.
Without the necessary background, I can't comment on the quality of the scholarship, unfortunately, or rate the book; all I can say is that it isn't light reading, and it isn't intended for those with a casual interest in the subject. However, it's quite well written.