The Child at the Party: A gripping and utterly unputdownable page-turner

Could she be my husband's secret daughter?

Rose's birthday party was everything I could have dreamed of; she adored her unicorn cake and balloons, and the surprise of her whole class arriving to celebrate. And now all the parents and children have left, I can finally relax - and find out exactly why my husband, Phil, disappeared halfway through. But who is the little girl still perched at our dining room table?

My daughter says she doesn't know her.

The child's eyes fix on the family photo in...