The Promise is a unforgettable story about finding love, hope and joy in even the darkest moments, by the Sunday Times bestseller Lucy Diamond, author of The Secrets of Happiness.

'I loved The Promise' - Libby Page, author of The 24-Hour Cafe

When faced with the sudden death of his brother, Dan's mission is clear. He puts together a project to help pick up the pieces and support his grieving sister-in-law Zoe, plus her young children. This is Dan's promise - to ensure his family's happiness, and to try and live up to the man his brother was.

But tying up loose ends brings a shocking secret to light, and calls into question everything Dan knew about his older brother. With more than just his promise on the line, Dan is faced with an ultimatum: Should he tell the truth and risk his family's fragile happiness, or will his brother's secrets end up becoming his own?

'A bittersweet, big-hearted take on family dynamics, grief, and how to make happiness a priority' - Woman and Home

'This is Lucy Diamond at her very best - a stunning novel that will break your heart into little pieces and then glue it back together again with joy' - Milly Johnson

'We couldn't put this down' - Bella

'Family drama at its very best with characters that have you reaching out to them' - My Weekly

Real readers love The Promise:
'I cried and laughed'
'It was a beautifully written book from start to finish. Each night I couldn't wait to read the next chapter.'
'I literally cannot put it down.'