It seems that a lot of junk being sold these days garners dozens, sometimes hundreds, of reviews on this site. It is a shame that a book of this quality has, to date, received only two reviews (mine being the third).
I was enticed into reading this book after listening to Graham Turner talk about it on Radio 4. He talked about his own experience as a young man in which he was asked by en evangelical Christian friend of his (with whom he was stationed in Singapore on national service in the 1950s - and did not appear to like very much) to try experiencing total silence for a short period.