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Also by Gilly Macmillan:

The Burning Library, November 2025
Hardcover / e-Book / audiobook
The Manor House, November 2024
Paperback / e-Book
The Manor House, July 2023
Hardcover / e-Book
The Long Weekend, March 2023
Paperback / e-Book
The Long Weekend, April 2022
Hardcover / e-Book / audiobook
To Tell You the Truth, August 2021
Paperback / e-Book (reprint)
The Nanny, May 2021
Mass Market Paperback / e-Book
To Tell You the Truth, September 2020
Hardcover / e-Book
The Perfect Girl, January 2020
Mass Market Paperback / e-Book (reprint)
The Nanny, September 2019
Hardcover / e-Book
I Know You Know, September 2018
Paperback / e-Book
What She Knew, February 2018
Mass Market Paperback / e-Book (reprint)
Odd Child Out, October 2017
Paperback / e-Book
The Perfect Girl, September 2016
Trade Size / e-Book
What She Knew, December 2015
Paperback / e-Book

WHAT SHE KNEW
By: Gilly Macmillan

Jim Clemo #2
William Morrow
February 2018
On Sale: January 30, 2018
560 pages
ISBN: 0062691007
EAN: 9780062691002
Kindle: B00WR12MEC
Mass Market Paperback / e-Book (reprint)
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Other Editions
Paperback (December 2015)

Suspense Psychological

In her enthralling debut, Gilly Macmillan explores a mother’s search for her missing son, weaving a taut psychological thriller as gripping and skillful as The Girl on the Train and The Guilty One.

In a heartbeat, everything changes…

Rachel Jenner is walking in a Bristol park with her eight-year-old son, Ben, when he asks if he can run ahead. It’s an ordinary request on an ordinary Sunday afternoon, and Rachel has no reason to worry—until Ben vanishes.  

Police are called, search parties go out, and Rachel, already insecure after her recent divorce, feels herself coming undone. As hours and then days pass without a sign of Ben, everyone who knew him is called into question, from Rachel’s newly married ex-husband to her mother-of-the-year sister. Inevitably, media attention focuses on Rachel too, and the public’s attitude toward her begins to shift from sympathy to suspicion.

As she desperately pieces together the threadbare clues, Rachel realizes that nothing is quite as she imagined it to be, not even her own judgment. And the greatest dangers may lie not in the anonymous strangers of every parent’s nightmares, but behind the familiar smiles of those she trusts the most.

Where is Ben? The clock is ticking...