A gripping new psychological thriller from the author of the international bestseller Before I Go to Sleep. How well can you really know another person? And how far would you go to find out the truth about them? When Julia learns that her sister has been violently killed, she knows she must get to the bottom of things. Even if it means jeopardising her relationship with her husband and risking the safety of her son. Getting involved with a stranger online. Losing control. Perhaps losing everything. Set in Paris and London, Second Life is about the double lives people lead - and the dark places they can end up in. Tense and unrelenting, it is another brilliant novel from S. J. Watson.