It is quite remarkable and I'm still trying to take it all in but I love his ideas as it gives a real meaning to Avebury and his perception of Silbury Hill and the meaning of its Causeways, which, as a female, I was completely stunned by.
Without reading it I can't pass comment but I suspect it is one of many books that have been written about Avebury/Silbury from a subjective, theorising view point - though an enjoyable read I'm sure.
Jim Leary and David Field are both archaeologists who work for English Heritage and I'm fairly sure the main body of their book will be grounded in what was found (and later analysed using radio carbon dating) whilst the conservation work on Silbury took place during 2007/08. For now it will be the closest we can get to gaining some small insight as to why/what Silbury was about.