Who Killed Ruby?

'Gripping psychological suspense' Fiona Barton, Sunday Times bestselling author of The Child'Keeps you guessing till the very end' Cara Hunter, author of All The RageYou never know what's going on behind closed doors...If you passed it on the street, you'd see an ordinary London townhouse. You might wonder about the people who live there, assume they're just like you.But inside a family is trapped...