Mark the Mountain Guide author, Mark Seaton, is a British mountain guide who lives with his wife and children in the Chamonix valley. He guides climbers and skiers in the French, Swiss and Italian Alps. Seaton's accomplishments as a professional mountain guide include the first complete unassisted British guided ascent of the Eiger Nordwand with his client Charles Sherwood in 2007. In 2008, Seaton & Sherwood teamed up again to complete a traverse of Mont Blanc via an ascent of Aiguille Blanche de Peuterey, the most difficult 4000-m summit in the Alps. In 1996, Mark led Don Planner, the first blind man to climb
Grünhorn the Bernese mineralogist Edmund von Fellenberg with guides Peter Michel, Peter Egger and Peter Inäbnit. They climbed the mountain from the west side, starting at the "Ewigschneefeld", a tributary glacier of the Aletsch Glacier. They successfully reached the summit despite very bad weather conditions. The same climbers had made an attempt on the peak in the previous year, but they could only reach a lower prominence of the Grünegghorn. The second ascent was made by W. A. B. Coolidge, with guides Christian and Rudolf Almer (sons of Christian Almer). A route on the north-east ridge was opened on 26 August