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.

'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

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