Caller Unknown

The Heart-Stopping New Thriller from the Sunday Times Bestselling Author of Wrong Place, Wrong Time

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Caller Unknown

By: Gillian McAllister

Narrated by: Juliet Rylance

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Brought to you by Penguin.

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

A road trip across America with her teenage daughter was meant to be much-needed bonding time for Simone before Lucy leaves home for university.

But on the first night of their stay, in a cabin deep in the Texan desert, Simone wakes to find Lucy missing and a mobile phone in her place. The phone rings and the voice on the other end issues instructions: Don’t tell the police. Come to this location. Be prepared to do a deal…

There is nothing Simone wouldn’t do to save her daughter. Hide the truth. Commit a terrible crime. Become a wanted woman.

But this is no ordinary kidnap and ransom. Getting Lucy back is just the beginning.

'The best of the best' LISA JEWELL

'As moving as it is gripping' SOPHIE HANNAH
'Utterly original' SHARI LAPENA
'You’ll gasp, you’ll cry, you’ll never forget this story' HOLLY SEDDON

© Gillian McAllister 2026 (P) Penguin Audio 2026

Gillian McAllisterJuliet RylancePenguin

Crime Thrillers

Psychological

Suspense

Thriller & Suspense

Crime Thrillers Psychological Suspense Thriller & Suspense

Critic reviews

An unputdownable adventure that was both heartwarming and thrilling! Everything I've come to expect from Gillian McAllister! (FREIDA MCFADDEN)

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, (LISA JEWELL)

Tense, twisty, and an emotional gut punch—CALLER UNKNOWN is a one-sitting read. (KARIN SLAUGHTER)

A taut, heart-in-mouth action thriller. With Gillian McAllister’s trademark beautiful writing, not only is Caller Unknown a wonderfully atmospheric and twisty read, it’s also a powerful ode to motherhood. I couldn’t put it down. Absolutely superb (CLAIRE DOUGLAS)

Chilling, immersive, atmospheric and poignant; Caller Unknown is beautifully told, with a wonderful trademark McAllister twist that fans will hope for but still not see coming. Masterful. (ANDREA MARA)

An utterly original kidnap story that throbs with tension—hard to put down. (Shari Lapena)

Another terrifically tense thriller from a writer at the absolute top of her game (ERIN KELLY)

Utterly HOOKED! I was journeying through that desert, living every twist, turn and surprise. Immersive, heart-pounding and astoundingly brilliant. (LUCY CLARKE)

Utterly compelling, gripping and so entertaining! (LIZ NUGENT)

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)

Most relevant

I’ve read all of Gillian’s books, this one might be the best yet! Outstanding! You will feel all the emotions!