The only one who can find your daughter? The woman you just divorced.

Mark Campbell is in trouble. Deep trouble.

His latest book is five years late and his recent divorce has cleaned him out. Worse, his debts with Vic Hebden aren’t exactly the kind you consolidate loans into one easy payment. And he’s already missed three.

But Mark has a plan—finish his novel, then pay Hebden off with the advance. His student daughter, Kay, is spending her summer holiday to research locations in the far north of Scotland, ahead of a father-daughter holiday.

Desperate to add her research to his book, their hotel calls—Kay has run off, leaving a big bill, her phone, and a copy of Mark’s last book, Break the Chain.

There's only one person to turn to—his ex, Olivia. Kay’s stepmother. A Glasgow cop still angry at their recent divorce.

As they hunt the Scottish Highlands for his daughter, Mark starts to realize Kay’s disappearance could have something to do with Break the Chain, the book where he exposed the founder’s sexual abuse, similar to the religious cult he grew up in.

Could Kay have succumbed to the clutches of someone from the cult? Or does Hebden have her? And can Mark and Olivia save her in time?

Lost Cause is a stand-alone psychological thriller from the best-selling author of the Cullen, Fenchurch and Dodds series, perfect for fans of Mark Edwards, Linwood Barclay, and Harlan Coben.