Gilly Macmillan is the internationally bestselling author of WHAT SHE KNEW, THE PERFECT GIRL, ODD CHILD OUT, I KNOW YOU KNOW, THE NANNY, TO TELL YOU THE TRUTH, THE LONG WEEKEND, and THE FALL (UK Edition) / THE MANOR HOUSE (US Edition).  

THE BURNING LIBRARY, her latest novel, will be out in hardback in the US and Canada in November 2025 and in the UK in January 2026.

Gilly’s books have appeared on the New York Times, The Sunday Times, Globe & Mail and Der Spiegel bestseller lists and have been translated into 25 languages.  TO TELL YOU THE TRUTH was named one of the New York Times’  Best Thrillers of 2020.

‘Ms. Macmillan is one heck of a good writer’ —Wall Street Journal

‘Macmillan writes with verve and emotional acuity’ —The New York Times
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