Illustration-heavy, The World of the Druids is a partial introduction to the Celtic Druids. Green reviews the various sources of information about the Druids (classical texts, archaeological evidence, and Welsh and Irish myths). Relying heavily on the near-300 illustrations that make up the bulk of the text, Green analyzes the little we do know about Druids: their political and religious roles, ancient Celtic religious practices, and the use of sacred space. Some of the text is dubious extrapolations, but Green is generally willing to admit just how little we do know. The tail end of the book looks at the Druidic revival, including renewed interest in the Druids, early modern texts on Druids, the erroneous but commonplace connections between Stonehenge and Druids, and historic and current new Druidic religions and movements, including aspects of Neopaganism. A little repetitive, lacking in-depth analysis and commentary, but with copious illustrations. This is a decent introduction to the subject and interesting to look through, but not particularly useful. Borrow it, don't buy it.
Beyond doubt, the illustrations are the most interesting and useful part of this text. There are nearly 300 of them, all with explanatory captions; many are also mentioned in the body of the text itself. They cover a variety of topics, findings, landmarks, and archaeological digs. Texts on Celtic history and religion generally lack illustrations or, if they have some, have few, making this a useful resource. Unfortunately, some of the images are drawn reproductions (rather than photographs) and few are in color, somewhat decreasing their value or usefulness. Furthermore, Green fails to discuss any of the illustrations, or indeed any one aspect of the text, in much depth. As a result, The World of the Druids is a quick read and doesn't require revisitation--I recommend that the interested reader find a copy to borrow rather than purchasing the text.
The lack of depth is the most disappointing part of the text. To some extent, the lack of depth isn't Green's fault: we know very little about the Druids, and so much of the text resolves to unanswered questions and admitted gaps in our knowledge. That said, while there may not be many hard facts to relate, Green could do a better job of discussing what we do and don't know. The text contains some worthwhile information: Green dispels a number of common misconceptions, has a good grasp of the classical texts discussing Druidism, and writes a fair and balanced historical overview of the study of, writing about, and interest in Druids. However, she tackles no one subject in sufficient depth. Almost every page is split into a main body, a number of illustrations with captions, and an inserted box on a related subject or illustration. These numerous divisions make the text read quickly, but limit the depth and detail that Green can go in to.The result is a fairly broad, approachable text that lacks in depth and ultimately in usefulness. I recommend this book as an introduction to the subject and as a source of illustrations, but the interested reader should definitely go beyond this text and look for other, more detailed scholarly texts on the subject. For the same reason, this is a good book to borrow but not worth buying. That money is better spent on more detailed texts that will require time, attention, and even note-taking.