The blockbuster new thriller by number one Sunday Times and multi-million-selling master of crime fiction, Mark Billingham​
You'll never know my real name. You'll never know what I've done. ​

I'm a former undercover police officer. Not that coppers like me ever get to walk away ... not really. Even when the case is done, we keep living the lie.​

After years on the force, I've finally managed to find some anonymity. A tedious job, a normal life. But then a young man walks into my workplace, whispers "I know who you are" and sets himself on fire.

That's when everything changes.

Who is this stranger? Who put him up to this? How much do they really know?​

Only one thing is clear: there's no hiding anymore. Do I run, as I have done so many times before, or do I face the sins of my past and go back undercover?​

What if my darkest secret is the one I didn't know I had?