As noted by Mr. Greer, there is little we can know for certain about the original Druids of the Celtic world, outside of the anecdotes preserved about them by their Roman adversaries. However, as many continue to seek links with the past and with nature across time and space, the romance of what people imagine about the Druids continues to inspire and resonate with many seeking a spiritual path based on nature and the ancient past. Thus, the birth of modern Druidry.
Mr. Greer's book is divided into three parts, (1) "The Druid Tradition in the Modern World" (the Druid Revival which began in the 1700s and its various descendants), (2) "The Three Triads of Druid Philosophy" (which includes such subjects as the three rays of light, circles of manifestation, the elements of nature (three in druid tradition, as opposed to the 4 or 5 of alchemical or neopagan traditions), solar and telluric currents. stations of the year, ogham, and the place of Taliesin, Arthur and Merlin in Druidry, and (3) "Initiation into the Druid Tradition", which includes three paths of practice which connects one to nature (both contemplation and action), to ritual and the annual cycle, and to one's self through various practices of meditation.
This book also serves as a manual for the first stage of the study of Druidry according to the approach of the AODA (Ancient Order of Druids in America), which Mr. Greer heads as Grand Archdruid ([...] Mr. Greer is to be commended on an honest, pragmatic and very readable approach to an earth-oriented spirituality to which many find themselves drawn.