'Addictive' Amazon reviewer'Impossible to put down' Amazon reviewer'Twists and turns galore' Amazon reviewer From the internationally bestselling authors of The Wife Between Us comes this electrifying new psychological thriller about truth, lies and deadly obsession . . . When Jessica signs up for a psychology study conducted by the mysterious Dr Shields, she thinks all shell have to do is answer a few questions, collect her money and leave. But as the questions grow more and more invasive, she begins to feel as though they know what shes thinking . . . and what shes hiding. As Jessica's paranoia grows, it becomes clear that she can no longer trust what is real in her life, and what is one of Dr Shieldss manipulative experiments. Caught in a web of deceit and jealousy, Jess quickly learns that some obsessions can be deadly. Here's what readers are saying: 'This is a smart, chilling and suspenseful novel that doesnt let you off the hook until the very last page' 'A great read that has me looking over my shoulder and questioning my daily choices and interactions' 'Deceit, jealousy, obsession, paranoia - An Anonymous Girl has this in bucket loads' Greer Hendricks and Sarah Pekkanens previous books include The Wife Between Us and An Anonymous Girl.