The no. 1 New York Times bestseller from the author of Big Little Lies

How well do you know your husband?

Cecilia Fitzpatrick, devoted mother, successful Tupperware business owner and efficient P&C President, has found a letter from her husband.

"For my wife, Cecilia Fitzpatrick, to be opened only in the event of my death"

But Cecilia's husband isn't dead, he's on a business trip. And when she questions him about it on the phone, Cecilia senses something she hasn't experienced before. John-Paul is lying.

What happens next changes Cecilia's formerly blissful suburban existence forever, and the consequences will be life-changing for the most unexpected people.

"A staggeringly brilliant novel. It is literally unputdownable." Mail on Sunday

"So good you won't be able to keep it to yourself" USA Today

"The story is cleverly plotted, full of suspense and so well-written that it pulls you in from the first page" Sunday Mirror

"Dark and compelling, this is a must read" Sun

"Intelligent and funny" Sydney Morning Herald