The series started off well but it has steadily gone down hill from book three onwards. The book is especially grating, thirty percent of the material regurgitated from previous books, the Operation Mincemeat letter writing section had me fast forwarding, it was painfully slow but the worst howler, an indication that the authors (s) really didn't care about the reader was the kilometres to miles calculations when Charity was driving up country. Inches, feet, yards, rods, poles, perches, furlongs and miles and all the other associated Imperial measurements. The UK had them then and still has them now. Sloppy research. In conclusion, the series has gone south rapidly. I am reading Spymasters, but this seems to be following the same downward pattern. Disappointing.