My Sister is one of those books that grabs the reader right from the start, from the opening paragraphs I started collecting unanswered questions which were frustrating and compelling at the same time! The book throws its reader into the action from the very first paragraphs when Irini receives a call in the early hours in the morning from her estranged sister, Elle.

The sisters couldn't be anymore different, Irini is an anaesthetist living in London with her long-term boyfriend, Antonio. To all intents and purposes she's happy, however that isn't the full story as she is traumatised by the abandonment by her parents to her aunt and uncle at the age of three. She has never had any further contact from her parents and does not know the reasons as to why she was given away, as to why they chose to keep Elle rather than her. Elle on the other hand is still living in the family fold in Scotland, she is very beautiful but completely toxic, she uses men who seem to fall at her feet and generally treats people appallingly. It is for this reason that Irini has spent most of her adult life hiding from Elle so as not to get caught up in Elle's toxic world - as such, the early hours phone call is not welcomed and events start to spiral as Elle has once again found Irini.

The character development in this book is really good, straight away the reader understands the vulnerability of Irini and her ability to be influenced by Elle as she searches for answers as to why she was the one to have to go away. Conversely, Elle's character is terrifying! Her hold over Irini is instant despite Irini avoiding her for the last six years - there is a sinister undertone to Elle's narrative constantly throughout the book. Both characters are unpredictable which makes for a fantastic psychological read.

I think what makes this a stand out read is that it is a psychological thriller that focuses on the psychological side - and my goodness does Michelle Adams do this brilliantly well! There is no huge twist which is great because it didn't need it, the premise is simple, why did the Harringford's give Irini away, the plot to get the reader the answer is not - it is a multilayered plot which is gripping right through to the end. At the heart of My Sister is a story about relationships between siblings as well as between child and parent - and to what extent one will go to in order to protect as well as find out the truth.

My Sister is addictive through its unreliable (and unpredictable!) characters which is extremely hard to put down! A fantastic read.