Sex, food, envy, drugs, dreams and drink: addiction is never simple and rarely forgotten. SJ Watson, author of Before I Go To Sleep and now Second Life, shares his top 10 titlesI’d been working on my second novel for a while before I realised what it was really about. I’d been thinking about online lives, about how social networking allows us to present multiple versions of ourselves to the world, identities that are both highly curated and tightly controlled. At the same time, I’d been musing on how our sense of self is never really fixed, yet we tell ourselves one historical narrative, constantly rewritten to make sense of the changes in our lives. It can be all too easy to look back on the person that we