Beatrice is called back to the UK from her home in New York by her mother, who is frantic that her younger sister has gone missing. When the body is found, the police are convinced it was a suicide: Tess was pregnant and when she gave birth three weeks early, the baby was dead. Her psychiatrist has diagnosed her as having severe post-natal depression and as far as everyone but Beatrice is concerned, the case is closed. But Beatrice knows her sister, and she knows that she would never have killed herself. Soon she is running her own investigation, desperate for anything that will find her sister’s killer.

I could not put this book down and started yearning for my commute so that I could pick it up again. As well as being incredibly gripping, it is such a strong depiction of the relationship between Beatrice and Tess that it had me in tears on more than one occasion. Well worth reading.

Sister by Rosamund Lupton