Louise O'Neill shares an extract from her brand-new novel

Lead character, Samantha Miller, is a hugely successful wellness guru forced to examine the veracity of her own memories of a teenage sexual encounter in O'Neill's latest novel

Louise O'Neill's latest novel is out now

I have one sister, and we are close in age; there is only a year and nine months between us. And yet often when we talk about our childhood, it is as if we were raised in separate families.

We argue all the time — no, that doll was mine, not yours. Dylan was my baby-name, not yours. I was the one who went to McDonalds for my birthday, not you.