book cover of Caller Unknown
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Caller Unknown

(2026)
A novel by

 
 
They Took Her Daughter. Now She’ll Break Every Rule to Get Her Back.




From the Sunday Times bestselling author of Famous Last Words and Wrong Place Wrong Time comes an unmissable new thriller - available in paperback now!




A READ WITH JENNA BOOK CLUB PICK

'Unputdownable' FREIDA MCFADDEN

'The best of the best' LISA JEWELL

'Masterful' ANDREA MARA

'Tense, twisty, and an emotional gut punch' KARIN SLAUGHTER

'Absolutely superb' CLAIRE DOUGLAS

--

Your last words to your teenage daughter were, ‘Sleep well’. By the next morning, she has vanished.

Her bed not slept in, an unfamiliar phone in her place. Before you have time to catch your breath, it rings.
CALLER UNKNOWN


Someone has taken your daughter. They don’t tell you where. They don’t tell you why.

Only that you must do what they say to ever see her again. Do not contact the police. If you do, they will kill her.

You have a choice: do you risk contacting the authorities anyway?

Or, do you take the law – and your daughter’s life – into your own hands?
--


PRAISE FOR GILLIAN MCALLISTER

‘A first-class thriller’ SUNDAY TIMES




‘A writer at the top of her game’ CLAIRE DOUGLAS




'McAllister is an expert in taut, twisty thrillers' i PAPER




'A brilliant, brilliant book' JODI PICOULT




'What an incredible, gripping, thrilling read' LISA JEWELL




'Utterly effing magnificent. I could NOT put it down!' MARIAN KEYES




'I am totally in awe. This is one story I will not forget' HEIDI PERKS




'This is bravura novel-writing' IAN RANKIN


Genre: Mystery

Praise for this book

"A totally fresh read that kept me guessing until the very end!" - Ashley Flowers

"As moving as it is gripping, this superior thriller is, more than anything, a testament to the power of a mother's love." - Sophie Hannah

"Gillian McAllister [is] one of my favorite authors working in the genre. McAllister is the best at putting her characters in impossible situations and making her readers not only contemplate but feel what it would be like to find themselves in those situations." - Emily Henry

"Gillian McAllister has done it again! This is such a clever, tense and twisty book, I inhaled it in under a day. The pacing is perfection and the twist, when it comes, is deeply satisfying, but it is the characters that elevate Gillian's books into the best of the best, and the family dynamics that are so richly described that it's hard to believe they don't continue long after the book ends." - Lisa Jewell

"An utterly original kidnap story that throbs with tension--hard to put down." - Shari Lapena

"An incredibly page-turning mystery wrapped up in a thoughtful and thought-provoking exploration of a most unusual kind of grief. Absolutely outstanding, one of my books of the year." - Andrea Mara

"Only a Gillian McAllister thriller can make your heart race and then your heart melt from one page to the next! I'm a devoted fan!" - Liane Moriarty

"As a fiction writer myself it's really, really hard to fool me--I always guess the ending of books--but this novel blindsided me with twists and surprises that had me gasping...and with a poignancy about relationships and love that one rarely finds in the genre. A brilliant, brilliant book." - Jodi Picoult

"Caller Unknown sets a new standard for modern thrillers - you'll gasp, you'll cry, you'll never forget this story." - Holly Seddon


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