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 there’s one thing she hasn’t considered.

What if this is just what the kidnappers want?

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

Gillian McAllister is the Sunday Times and New York Times bestselling author of nine stand-alone novels. Her books have been selected for the Radio 2 Book Club, Reese's Book Club and the Richard & Judy Book Club. Her previous novel, Wrong Place Wrong Time, was a Waterstones Thriller of the Month and was shortlisted for The British Book Awards Crime & Thriller Book of the Year and the Theakston Old Peculier Crime Novel of the Year. Gillian's books are published in thirty-eight languages.