Everyone saw the murder happen, but the only person who knows the truth is the strange girl who won't speak.
It's the day of her mother's funeral when nineteen-year-old Odette sees Amos in the museum. She's compelled to speak to him: he looks just like a grandad from a John Lewis advert, and he looks lonely like her, too. When she approaches him, it turns out she's right, and the two form a life-saving friendship.
But sometimes, Odette feels the incredible urge to wrap her arms around Amos' neck. To hug him so hard that she accidentally squeezes the last breath from his lungs. These thoughts unsettle her, but she knows they are rooted in science. When humans see something loveable, they naturally feel the urge to squeeze, to kiss - even to bite. It's totally normal. Odette is totally normal.
But if she is, then how does Amos turn up dead, Odette covered in his blood? The murder is set to become national news and everyone wants to know one thing: how could this baby-faced girl turn out to be such a vicious killer?
We Know What You Did is an incredibly compelling and tense debut with an unforgettable voice and a protagonist that leaps off the page.