Before I start this review, I have to reiterate what others have already said; Childress is not an archaeologist in any sense of the word. He's an explorer, and his works are essentially travel narratives that weave together conjecture, pseudo-science, history and paranormal phenomena. They make for entertaining, and sometimes even though-provoking narratives. But they are not legitimate archaeology in any sense of the word, and I should know since it's my Major (mind you, I'm fairly open minded and I like his books; I'm simply stating that the material in these books isn't going to help you pass any Archaeology courses you might take).
That said, his quest for lost civilizations, Atlantis in particular, make for a good read if nothing else. This book is only part of the series, but it makes for a good starting point since he covers many well-known sites here. Starting in the Mediterranean, he conjectures the idea of a globe-spanning Atlantean empire, going on to mention lost continents in Babylonian lore, the Sea People, Hittite artifacts in the Americas, secret societies in Rhodes, the Phaistos disk, Thera, the Etruscans, Carthage, ancient Maltese megaliths, Mycenean ruins, the lost city of Tartessos, the origins of the Basque and Berber peoples, the now dead Guanches of the Canary islands, Phoenician exploration of the New World and much more.
He continues roaming onward, relating stories, myth and outright speculation as he travels through continental Europe. We are treated to the obligatory mention of the Knights Templar, the Merovignians and the Holy Grail, the Priory of Zion, the Frisian Atland and the Orea Linda manuscript, Stonehenge, Arthurian legend, the Druids, winged cats, ley lines, lost continents off the coast of Lyonesse, Celtic faerie lore, vitrified forts in Scotland, Loch Ness, the Picts and stranger things still. Divided up into chapters based around countries or regions, each section includes several pages of photos, maps, illustrations and runes. Most don't really give a great deal of information, but theres so much that it at least gets you thinking, perhaps doing more research by yourself. Heck, as I've said before, you could read the chapters by themselves without needing to worry about continuity or such.
Overall, DHC's works are well worth the read. Again, I have to emphasize that he is not a trained archaeologist as far as I know, nor does he conudct research in a scientific way. But hey, it's still interesting. It is speculation after all, but at the very least it makes for a thought-provoking read. Check this and his other books out, especially if you plan on travelling to any of the regions he mentions. The books practically read like and occult or paranormal travel guide at times.