Cressida Howard hears her husband, Laurence, on a phone call to a woman and is convinced he is being unfaithful. She decides that with the help of cyber security expert, Brioni O'Brien she can find out the truth and get the divorce settlement she really wants. Brioni finds out he is also up to eyes in corruption and blackmail that have big people from all over the place involved and it becomes clear that any women who may be associated with him may be in danger including Cressida and her daughter Emily. This is an addictive read that you want to keep reading and not put down. It is full of twists and turns that keep you guessing and gripped right to the end. This is the first book I have read by Sam Blake and now I want to see what else has been written by the author and want to read them. I would recommend this book to anyone who loves grippy thrillers.