Edge of the Map is equal parts inspiring, dramatic, and heartbreaking. One of America's greatest high altitude mountaineers, Christine Boskoff was at the top of her career when she and her partner died in an avalanche in 2006. Charismatic, principled, and humble, Boskoff was also a deeply loved role model to her climbing partners and the Sherpa community. Edge of the Map traces the sharp twists and turns in Boskoff's life, from her early years as a Lockheed engineer, through her first successes in the climbing world, to her purchase of Seattle-based Mountain Madness after owner and climber Scott Fischer died in the 1996 Everest disaster. Her life was one of constant achievement mixed with personal tragedy. The story follows Boskoff as she perseveres and moves on to even bigger peaks, earning acclaim as a world-class mountaineer, then later as she finds an alpine partnership with legendary Colorado climber Charlie Fowler.

Johanna Garton interviewed more than 75 friends and family of Christine Boskoff and Charlie Fowler, including notable climbers such as Peter Habeler, Nazir Sabir, Willie Benegas, Phil Powers, Mark Gunlogson (current owner of Mountain Madness), Hector Ponce de Leon, Steve Swenson, and Conrad Anker. Johanna also spent several weeks conducting research and interviews near the site of Boskoff's death in China. Garton is a journalist, attorney, and non-profit consultant who lives in Denver. Visit her online at JohannaGarton.com and on Instagram @johannagartonbooks and Facebook @johannagarton.

Edge of the Map is equal parts inspiring, dramatic, and heartbreaking. One of America's greatest high altitude mountaineers, Christine Boskoff was at the top of her career when she and her partner died in an avalanche in 2006. Charismatic, principled, and humble, Boskoff was also a deeply loved role model to her climbing partners and the Sherpa community.

Edge of the Map traces the sharp twists and turns in Boskoff's life, from her early years as a Lockheed engineer, through her first successes in the climbing world, to her purchase of Seattle-based Mountain Madness after owner and climber Scott Fischer died in the 1996 Everest disaster. Her life was one of constant achievement mixed with personal tragedy. The story follows Boskoff as she perseveres and moves on to even bigger peaks, earning acclaim as a world-class mountaineer, then later as she finds an alpine partnership with legendary Colorado climber Charlie Fowler.