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Warning Signs

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Brought to you by Penguin.

The seethe of wind through trees culled him hollow with loneliness. Against the immensity of the mountains, against the unforgiving chill of the air, he felt keenly his smallness, his vulnerability, how easy it would be for something to lift him into its jaws and vanish him.

At 12 years old, Zach admires his father almost as much as he fears him. When Bram takes him on a father-son business ski trip, Zach feels braver – his mother taught him the ways of the mountain, and the hushed whiteness will quieten Bram’s complaints, his obvious disapproval.
Then on the first night, Zach sees something moving in the snow. He’s convinced there’s a monster on the mountain, but there are other dangers that await the group...

© Tracy Sierra 2026 (P) Penguin Audio 2026

Critics Review

Wow, Tracy Sierra has done it again – knife-edge tension and a perfect denouement. Absolutely outstanding
Andrea Mara
Sierra's sharp, evocative writing builds a tension so taut that it had me holding my breath
Monika Kim
Tracy Sierra combines the forces of nature with the evil that men do to write an extraordinary double-whammy of a novel
Linwood Barclay
What a novel! Warning Signs ticks every box for an attention-commanding thriller. Buy it, lock your doors and shut off your phone
Jeffery Deaver
Sierra’s ability to seamlessly fuse a constant thrum of unseen, impending doom, with an aching tenderness that will break your heart is unparalleled
Ashley Tate
An isolated setting and a pulse-pounding fight for survival combine to make Warning Signs a truly stunning novel
Sian Gilbert
The best thriller I have read in a long, long time...atmospheric, full of heart and so nail-bitingly suspenseful that it had me at the edge of my seat from page one
Hildur Knútsdóttir
A taut survival thriller with heart . . . Sierra cranks the tension up, up, up before launching us into a pulse-pounding life-or-death chase
K.T. Nguyen
As breathtaking as an avalanche, Tracy Sierra’s Warning Signs is a perfect mix of inner torment, warped masculinity, evil suspense, and the sublime
Sierra Greer
Terrifying, chilling and emotionally visceral...I found myself holding my breath
Nikki Smith

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