It’s the ultimate test of endurance: two-hundred-and-fifty miles in the brutal heat of the Sahara, with only the supplies you can carry on your back.

Adri is ready. Returning to ultra-running in the wake of a scandal, she needs to prove to herself – and her young son – that she’s a winner.

When a fellow runner is badly injured, Adri knows something isn’t right. Yet in a race this extreme, even a dead body can be explained away.

But there’s a killer stalking the hot sand. And the problem with running faster than everyone else, is that you’re miles ahead of anyone who can save you...

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PRAISE FOR AMY MCCULLOCH

'Amy McCulloch is the queen of the adventure thriller!'-CLAIRE DOUGLAS

'Enthralling... She has an eye for edgy and unusual settings....' -SUNDAY TIMES

'Chills, thrills and intense suspense...'-CHRIS WHITAKER