I really liked this one. It is a British police procedural with the added twist of the woman in charge (Kat) being told she has to work with and evaluate an AI assistant (Lock). They are supposed to be working cold cases, but when they get a lead the case becomes active. Her reluctance to use the AI & it's eerie human like presence add both interest and humour. I was happy to see that there is a sequel. Thanks to NetGalley for the digital ARC. 5/5