Amy McCulloch is a world-renowned author who in 2022 toed the line of the iconic Marathon des Sables. The race and the experience planted seeds for a story, one of ultra-running and mystery. In June 2025, ‘RUNNER 13‘ was released.
Amy McCulloch is the internationally bestselling author of BREATHLESS, MIDNIGHT (also known as THE GIRL ON THE ICE) and RUNNER 13 – coming out worldwide in Summer 2025. She has also written eight novels for children and young adults, including the #1 bestselling YA novel The Magpie Society: One for Sorrow. In September 2019, she became the youngest Canadian woman to climb Mt. Manaslu in Nepal — the world’s eighth highest mountain. She has also summited the highest mountain in the Americas, Aconcagua, in -45C and 90kmph winds, and has visited all seven continents. In 2022, she completed the 36th Marathon des Sables, a 250km stage marathon through the Sahara Desert. She is also an A-licensed skydiver. She is currently working on her next adult thriller, continuing to draw inspiration from her adventures.
Amy joins the podcast to discuss the book and her MDS story.
My thoughts on the book:
Runner 13 is a thriller that drops readers straight into a deadly stage race across the Sahara, echoing the notorious Marathon des Sables in Morocco. McCulloch’s own experience running that event shapes every detail – the brutal desert landscape, the psychological toll, and the obsession with endurance that defines the sport. The story follows Adrienne, a once-great ultrarunner forced back into competition, and Stella, daughter of the race’s manipulative director, Boones, whose events, modelled on real-world extreme events, aren’t designed to be won, but to break runners. Central to the mystery is Runner 13, a symbol of both glory and doom. Told in sharp, cliff-hanging chapters that jump between present and past, the novel feels like Agatha Christie transplanted to the Sahara: a brutal race where survival, not victory, is the prize, and where Morocco’s desert becomes both the setting and the trap.
If you have participated in Marathon des Sables, the narrative of the book will feel familiar, you will relive your desert experience and of course, the added bonus of a murder mystery only makes the book more interesting. For newbies to the desert, rest assured, the book will be a wonderful escape and it can only make your future event even more ‘hotly’ anticipated – hopefully, the murder mystery element will be missing.
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