No I have not read the book But I consider the COT report as a very important piece of information in the trading armoury.
The problem that I see with the majority of anlysts that I have read over the past year - for it is within the past year that suddenly so many people have discovered the COT report - and publish stuff on it is: They do not follow the flow.... blindly suggesting that the spec are always wrong...not true they are trend followers .. or that blindly following the commercial is correct...not true they are responsive traders and build super long time frame positions that are frequently offset by another commodity AND are frequently way early with consequent drawdowns that many undercapitalised and non diversified accounts cannot withstand...... The majority of COT reporters do not build up a picture of the flow nor figure out the cross market positions and implications
It takes me any part of 2-3 hours to put my report together for regurgitating spec short record number of xxx product is in itself little value imho. There is one other way to look at COT flow but without the breakdown and that is to look at open interest movements which STILL today are reported one day in arrears by the exchanges but it requires to be followed almost on a tape reading basis to figure out or spot the footprints