519N8czdefL._SX310_BO1,204,203,200_Estranged from her husband and in the midst of a custody battle, Sophie loves nothing more than spending time with her daughter, Amy. Maybe she should have taken Amy’s announcement that a strange woman had been watching them more seriously because now, after a trip to the fair, Amy is missing. Sophie’s history of alcoholism means that the police and Paul, her ex-husband,  are suspicious of her story and this mistrust is exacerbated when new information emerges. What has happened to Amy? Who is the strange woman? Who is telling the truth?

This book is described as a ‘gripping psychological thriller’ and that is most certainly the case. Fast-paced from the start, the author takes you on a roller-coaster of emotions as you feel sympathy and despair as Amy goes missing, anger as Sophie desperately looks for someone who will believe her story and fear as it slowly emerges exactly what has happened to the child. Throughout the book, you find yourself willing Sophie to succeed as she battles the demons of her past.

One of the main strengths of this book is that, right until the end, you genuinely have no idea as to Amy’s fate. This uncertainty made S is for Stranger a quick read as I read chapter after chapter, hoping that the next part would reveal even the smallest of clues to explain exactly what was going on.

The only thing that stopped this being rated 5 stars was the ending. I felt that there were still too many unanswered questions and that made the solution a bit ambiguous. I would have liked a more conclusive finish.

With thanks to NetGalley and Carina for the advance copy.