Tense, chilling and terrifying with unforgettable characters and an unpredictable and atmospheric plot. One of the most original thrillers I've read. It deserves to be huge!

- Claire Douglas, Sunday Times bestselling author of The Couple at No. 9,

A vertigo-inducing page-turner by an author who brings the high-stakes world of expert mountain-climbing to life on the page

- Nita Prose, Sunday Times bestselling author of The Maid,

Gripping. Thrilling. A visceral account of a novice's struggles with thin air and exhaustion

Sunday Times

This thriller would be unsettling enough at sea level, but in the death zone, it's suffocatingly tense. McCulloch combines extreme mountaineering with murder to create a novel that's chilling, vivid, and entirely unique.

- Abigail Dean, Sunday Times bestselling author of Girl A,

The ultimate high-altitude mountain thriller. Ice-cold, twisting, deadly and doesn't put a foot wrong. It took me on a chilling journey to the death zone, and I loved it!

- Janice Hallett, Sunday Times bestselling author of The Appeal,

A blockbuster worthy thriller

OK!

Nail-biting, chilling, totally exhilarating - a true triumph

- Stacey Halls, Sunday Times bestselling author of The Familiars,

I loved it. I read it in two sittings. It was so tense by the end, the air in my bedroom felt as thin as in the mountains. I think it's a total triumph of a thriller.

- Gillian McAllister, Sunday Times bestselling author of That Night,

Set on an expedition to climb one of the world's tallest mountains, Breathless is an addictive, tightly plotted thriller that will leave you chilled to the bone

- Lucy Clarke, Sunday Times bestselling author of The Castaways,

I have climbed Manaslu with Amy, she's a very positive thinker with good energy to be around on the mountain - she is the real deal

- Nirmal "Nimsdai" Purja, star of Netflix's 14 Peaks and author of the Sunday Times bestseller Beyond Possible

If you liked Shiver by Allie Reynolds, you'll really enjoy this. Rich in authentic detail, it's a nail-biting novel

Woman's Weekly

A breathtaking book set at 8000 metres - the air alone can kill you, and there's a killer on the loose too. I absolutely loved this, the author's incredible knowledge of mountaineering really shone through - a real page-turner that I read in a couple of days. Tense, terrifying and fascinating in equal measure.

- Catherine Cooper, Sunday Times bestselling author of The Chalet,

A tense, absorbing thriller with the most spectacular setting imaginable. It's bleak, beautiful and powerfully atmospheric. I couldn't put it down

- Jennifer Saint, Sunday Times bestselling author of Ariadne,

Breathless is both a fascinating insight into the world of high-altitude mountaineering and a chilling, twisty thriller. Absorbing and atmospheric

- Louise O'Neill, bestselling author of After The Silence,

Vividly descriptive, packed with atmosphere, mystery twists, turns and tension, it's a nail-biter thriller

Choice Magazine

There really is something about the combination of a snowbound locale and a killer hiding in plain sign that is a recipe for success, and this is an absolute belter

Heat

Atmospheric enough to leave me shivering and gripping enough to make me unable to stop turning pages. This book followed me around the house as I inhaled Cecily's story, enjoying every fascinating minute of it. A 5* cracker

- Gytha Lodge,

A truly terrifying thriller with a tense and twisty plot and an incredibly dangerous setting. I loved the insight into the world of the high mountains and the people who risk their lives to climb them. A brilliant concept, superbly executed.

- Allie Reynolds, bestselling author of Shiver,

Breathless is a thriller that moves at a breakneck pace through the ice-packed dangers of the Death Zone. I felt like I was on the mountain and raced to the end. Read it, and it'll leave you breathless, too

- Laura Lam, Sunday Times bestselling author of Seven Devils and Goldilocks

It's a classic locked-room setting, but there's enough originality and style about this to make it an enjoyable and exciting read . . . A claustrophobic and intense read, a tale of proper obsession and danger. Keeps you turning the page, anxious to know what comes next.

NB Magazine

Its twists and turns leave your blood running cold

Good Housekeeping

It's rare that a thriller actually lives up to that word. But here - in the jeopardy its characters are plunged into, in the story's twists and turns, and in the true star of the novel, the mountain itself - Breathless truly manages to thrill

- James Smythe, author of I Still Dream

A truly breathtaking thriller. It had me gasping and guessing with every turn of a page. The audacity of the adventure is only matched by the brilliance of McCulloch's deft and evocative writing

- Kim Curran, author of the Slay series

A visceral, thrill-seeker's story of one woman's struggle to conquer her fears, with murder and mayhem at 8,000m. I really loved it.

- Rosie Andrews, author of Leviathan,

A frighteningly original novel written with a deep passion for the mountains and an inquisitive mind. A brilliantly chilling read

- Giles Kristian,

Chilling . . . there really is something about the combination of a remote snowbound location and a killer hiding in plain sight that is a recipe for success

Crime Monthly

A blockbuster-worthy thriller

Sunday Express