The letterbox clatters and sitting on the mat is a piece of paper, in black and white, with everything needed to blow Anna's perfect life apart.

A baby scan photo.

Anna and Jon have been trying for a baby with no success, so after years of disappointment, this feels like a kick in the teeth.

Who sent it? And why?

Anna's thoughts fall on Grace - the keen young woman Jon hired at their printing business. Something about Grace isn't quite right. She asks too many questions and makes Anna nervous but she can't work out why.

And she can't deny she sees the way her husband looks at her.

All she knows is this baby scan might tear her marriage apart...

'An addictive thriller which will keep you hooked until the last page' Diana Wilkinson

'The New Girl had me on edge from the explosive beginning to the tension-filled end.' M A Hunter

...

Praise for Alison Stockham

''An intense and thrilling read, with a propulsive plot, THE NEW GIRL is packed with high stakes drama. I couldn't stop reading until all the mysteries were answered.' Lucy Ashe

'It begins with a visceral shock and evolves through unexpected twists and turns to a deeply felt and satisfying conclusion' Greg Mosse

'This was a beautifully written debut that handles a difficult subject matter with a delicacy that makes me excited to read whatever Alison Stockham writes next' Stacy Thomas

'This book comes with a killer hook... Sibling relationships, post-natal depression, marriages with cracks that turn into fissures and the nature of friendship are all explored via a pacy storyline.' Jo Leevers

'Stormed through The Cuckoo Sister by Alison Stockham... A fascinating premise and she handles it admirably, with nuance and compassion.' Laura Pearson

'Beautifully poignant and utterly compelling.' Alex Stone

'An emotional and relatable story.' Louise Douglas

'Such a clever and engaging book with a late twist that I absolutely did not predict.' Beth Miller

'A brilliant concept delivered with real emotional depth and clout. I felt for each and every character in this story of family, guilt and deepest desires' Gytha Lodge