From the No.1 bestselling author of The Perfect Couple and The Vanishing of Class 3B comes an addictive thriller for 2026! Perfect for fans of Lisa Jewell and Freida McFadden!

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What if the most dangerous thing you did this weekend was go for a run?

On a bright spring Saturday, hundreds gather in a park as usual for their weekly community 5k run.

An hour later, one of the runners is dead.

The next week a runner training for a 10k event dies. And then another, a half marathon runner…

The police are baffled. The pattern is the same, the deaths can’t be coincidental. Is there a murderer picking off victims one race at a time?

Ten million adults are regular or occasional runners.

Ten million potential victims.

With the next event just announced, as you reach the start line you might just have to run for your life…

'I have not stopped going on about this book to people since I read it! Jackie does that magical and rare thing: she takes a never-done-before genius premise, but is equally genius in her delivery and reveal… this book will stay with me for a long time’ Caroline Corcoran

‘Pacy and thrilling… I genuinely struggled to put [this] down. I absolutely devoured it’ G D Wright

'Riveting, propulsive and masterfully executed, this book is utterly moreish. The pace and twists are so on point for a story about running. It certainly left me breathless! Naomi Williams, author of The Woman in Ward 9

‘A chilling whodunit with a nightmare scenario… another twisty, rattling good thriller that will keep you guessing until the last page’ Jane Bailey, author of Stay

‘Had me on the edge of my seat… fantastic… If you haven’t read this, what are you doing??!’ ⭐⭐⭐⭐⭐

‘My son runs marathons and I’m aways there to cheer him on… awesome read… I highly recommend’ ⭐⭐⭐⭐⭐

‘A real who done it, why and who would be next… had me up late into the night’ ⭐⭐⭐⭐⭐

‘An explosive thriller… the characters are so well described… a mystery you won’t be able to put down’ ⭐⭐⭐⭐⭐

‘Wow! An exciting and tense read… I really couldn’t put it down… loved it!’ ⭐⭐⭐⭐⭐

‘Pacy and suspenseful… a convincing plot and short, snappy chapters… compelling one sit read’ ⭐⭐⭐⭐⭐

‘Be prepared to binge read as the twists and turns keep you on a roller coaster of a read’ ⭐⭐⭐⭐⭐

‘Oh my gosh I LOVED this book! It’s been a few days since I finished this one and I still can’t stop thinking about it’ ⭐⭐⭐⭐⭐

‘Grabs you instantly… incredibly easy to binge’ ⭐⭐⭐⭐⭐

‘The kind [of book] you finish in a single day because you need to know what happens next’ ⭐⭐⭐⭐⭐

‘Fast-paced, suspenseful and kept me guessing’ ⭐⭐⭐⭐⭐