Diane Jeffrey

Diane Jeffrey is a USA Today bestselling and award-winning author.

She grew up in North Devon and Northern Ireland. She now lives in Lyon, France, with her husband and their three children, Labrador and cat.

Diane has written eight psychological thrillers, all published by HQ / HarperCollins.

THE GUILTY MOTHER, Diane's third book, was a USA Today bestseller and her fourth novel, THE SILENT FRIEND, was a Karin Slaughter Killer Reads pick for ASDA. Her fifth psychological thriller, THE COUPLE AT CAUSEWAY COTTAGE, won the 2023 International Thriller Writers award for the best ebook original novel. The French translation of THE OTHER COUPLE (Écarts de Conduite) won the 2025 Noir sur Ormesson prize for best thriller.

A MOTHER ALWAYS KNOWS is Diane's latest psychological thriller and will be released in March 2026 in ebook, audiobook and paperback.

Diane is an English teacher. When she's not working or writing, she likes swimming, running and reading. She loves chocolate, beer and holidays.

Above all, she enjoys spending time with her family and friends.

Readers can follow Diane on Instagram, X, Facebook, Bluesky and contact her or sign up to her newsletter via her website.