Having read all the books in this series, I feel qualified to say this, Book #9, was the best of them all!The story line never quit, one event after another kept happening until the very last page. Tom Harper and his family have so much depth after eight books, that there was a constant interplay of different happenings that were gripping.
DCI Harper and his colleagues from years past all coalesce to solve what seemed like an endless and ever growing list of crimes. An actual list which the inspector pinned up on his office wall and added to as they went along. Starting with an American criminal based "loosely" on a real man who was a product of Leeds incidents of increasing importance occurred. Pressure was put on the various divisions that Harper was in charge of by the newspapers and other city officials.
Added to that is the facts that 20 years have occurred since the first book, and both Tom and his wife Annabelle are aging. Their daughter Mary, a business woman now is engaged to be married. Now she and her father must conspire in their protection of a possible live changing event for his wife and her "Mam".
From the author's ending of the book, I am hoping we are going to be expecting a tenth in the series as "War" has been mentioned by the Chief Constable and the Home Office. DCI Harper needs to start preparing for replacements in the force as well as changed in his personal life. I'll be waiting!