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There are fourteen 8,000 metre Himalayan peaks, known as the 8000ers. The first person to ascend all fourteen was legendary mountaineer Reinhold Messner. The quest to ascend all fourteen 8000ers has become the ultimate route tick.
All 14 Eight-Thousanders
by Reinhold Messner
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Everest
Everest, standing at an altitude of 8,840 metres on the Nepalese Tibetan border is the highest 8000er. It was first ascended by a British expedition in 1953.
Everest: Mountain Without Mercy (Imax): Mountain Without Mercy (Imax)
by Broughton Coburn; Tim Cahill
£11.89
The Death Zone: Climbing Everest Through the Killer Storm
by Matt Dickinson
£6.99
Into Thin Air: A Personal Account of the Everest Disaster
by Jon Krakauer
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Everest: Mountain Without Mercyby Broughton Coburn£17.63
Everest: The Unclimbed Ridge (Adrenaline Classics)by Sir Chris Bonington£6.76
Mountain Madness: Scott Fischer, Mount Everest, and a Life Lived on Highby Robert Birkby£10.55
Last Climb: The Legendary Everest Expeditions of George Malloryby David Breashears£17.83
Triumph on Everest: A Photobiography of Sir Edmund Hillary (National Geographic Photobiographies)by Broughton Coburn£4.79
First Over Everest, the Houston-Mount Everest Expeditionby Fellowes Air Commodore P F M
Climbing Everest: Tales of Triumph and Tragedy on the World's Highest Mountainby Audrey Salkeld£9.10

K2

K2, in the Karakorum range is the second highest peak at 8,611 metres and is considered to be far harder than Everest. It was first climbed in 1954 by an Italian expedition via the Abruzzi spur.
Savage Summit: True Stories of the 5 Women Who Climbed K2
by Jennifer Jordan
£5.99
K2, the Savage Mountain
by Charles S. Houston
£8.61
High: Stories of Survival from Everest and K2 (Adrenaline)
by Clint Willis
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K2 the 1939 Tragedyby Andrew J. Kauffman£9.55
K2, Quest of the Gods: The Great Pyramid in the Himalayaby Ralph Ellis£9.50
The Last Step: The American Ascent of K2by Rick Ridgeway
K2: The Story of the Savage Mountainby Jim Curran
K2: One Woman's Quest for the Summitby Heidi Howkins
K2: Triumph and Tragedyby Jim Curran
In the Zone: Epic Survival Stories from the Mountaineering Worldby Peter Potterfield£7.59

Annapurna

Annapurna in Nepal at an altitude of 8,091 metres, was the first 8000er to be climbed. The French expedition suffered terrible frostbite injuries, yet the leader Maurice Herzog went on to be a national hero in France.
Trekking in the Annapurna Region (Trailblazer Guides)
by Bryn Thomas
£10.99
Annapurna: The First Conquest of an 8000-metre Peak
by Maurice Herzog
£7.69
Annapurna: A Trekker's Guide (Cicerone Mountain Walking)
by Kev Reynolds
£12.99
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Nepal: Kathmandu Valley, Chitwan, Annapurna, Mustang, Everest (Lonely Planet Pictorial)by Richard I'Anson£27.00
Annapurna: A Woman's Placeby A Blum£8.15
Annapurna South Faceby Sir Chris Bonington
Annapurna Circuit: Himalayan Journey (Travel Literature)by Andrew Stevenson
Annapurna: A Trekker's Guide (A Cicerone guide)by Kev Reynolds
Annapurna: Conquest of the first 8000 metre peak (26,493)by Maurice Herzog
True Summit: What Really Happened on Maurice Herzog's First Legendary Ascent of Annapurnaby David Roberts
The other 8,000ers
The remaining 8000 metres peaks are not the subject of quite so many books. The 'easiest' is reputed to be Cho Oyu.