'The book of 2025' – Mail on Sunday

Working late?

Midnight calls?

Suspicious texts?

One in five of us will have an affair in our lifetimes – but the reasons behind them might not be what you think.

Psychotherapist Juliet Rosenfeld shares the secrets, lies and motivations behind real affairs, through the lens of five very different true stories.

We meet the man who left his wife in the delivery suite to visit his young mistress and the psychologist who put attraction to a patient above career ethics. We hear from the surgeon who risked everything for someone he'd only ever spoken to online and the previously straight woman who cheated on her husband with a female colleague – and changed all of their lives.

In Affairs, this deeply-concealed but exceptionally common aspect of human behaviour is brought out into the light and explored without judgement or shame.

True personal stories, ground-breaking research and expert psychological analysis come together to change everything you have ever thought about infidelity.

'Smart, absorbing' – Nick Hornby

'Hugely thoughtful and stimulating. . . Can't fail to leave us with new insights on our lives' – Alain de Botton

'I found it brutal, heartbreaking and, in a strange way (after its tales had settled in me) inspiring' – You Magazine