Sometimes you want to poke publishers in the eye. What we have here is a well-presented, exciting core thesis - that a cometary impact towards the end of the Ice Age devastated North America, wiped out the megafauna and destroyed the Clovis culture - plus several interesting but nevertheless speculative linked ideas. But the title and the cover latch on to some of the least convincing speculation and ignore the main subject. You could weep.
Why "The Cycle of..."? The whole point about the 13,000 BP event was that it was the stand-out event of the last 60,000 years. The authors mention some other people's suggestions that such events occur cyclically, but really only in passing. Indeed their own secondary thesis is that the Clovis event was itself triggered by a star in our corner of the galaxy going supernova about 30,000 years ago. What's cyclical about that?
And then the cover appears to be showing the destruction of a civilisation, presumably Atlantis - again a topic only mentioned in passing by the authors. Because, of course, the Atlantis story is about just that - the destruction of a civilisation. If it has any link to true events, then they can't predate the Neolithic.
The scientific detective story uncovering the Event itself is excellent and is why the book is "mostly" very good. There are one or two inconsistencies in their analysis of where exactly the impact or impacts took place, but I'll leave those for readers to spot. However, the links to the possible supernova are tenuous, the importance of the Toba eruption is glossed over, and the endless quoting of folk tales about fire and flood is irritating and maybe even irrelevant, for two reasons.
Firstly, as the authors point out, it appears that North America was essentially depopulated for a couple of millennia after the Event - there were no local survivors to pass on the story. And secondly, tree-ring studies show that there have been several pretty horrible climatic events, albeit not on the same scale as the Clovis event, much more recently. Mike Baillie (several of whose books I have reviewed on Amazon) has demonstrated likely cometary causes, with therefore associated fire and flood, for these events as well. It strikes me as more likely that the folk tales have more recent sources.
So - an important book. Read it, but read it for the right reasons.