Remember Me: The gripping, twisty page-turner you won't be able to put down this Christmas

Last night my sister was murdered. The police think I killed her. I was there. I watched the knife go in. I saw the man who did it. And heard him laugh when he said he'd never be caught. Because he knows I have prosopagnosia - I can't recognise faces. And if I don't find the man who killed my sister, I'll be found guilty of murder.