The Atlantis Researches
First published in 1995, it was re-published as an updated second edition under the title Atlantis of the West.
Although now out of print, second-hand copies of the first printing are now quite a collector's item! Some are being advertised at silly prices.
Tags: The Atlantis Researches, Megaliths, Atlantis, Plato, Ancient Astronomy, Celtic Myth, Egyptian myth, Elysian Fields, catastrophism, pole-shift, Irish legends, Welsh legends, Otherworld, Annwn, Irish Sea, Druids