Let Me Lie by Clare Mackintosh

The police say it was suicide.
Anna says it was murder.
They're both wrong.

One year ago, Caroline Johnson chose to end her life brutally: a shocking suicide planned to match that of her husband just months before. Their daughter, Anna, has struggled to come to terms with their loss ever since.

Now with a young baby of her own, Anna misses her mother more than ever and starts to question her parents’ deaths. But by digging up their past, she’ll put her future in danger. Sometimes it’s safer to let things lie…

The stunning, twisty new psychological thriller from number one bestseller Clare Mackintosh, author of I Let You Go and I See You.