For many years Mark Horrell has been writing what has been described as one of the most credible Everest opinion blogs out there. He writes about trekking and mountaineering from the often silent perspective of the commercial client. For nearly 20 years he has been exploring the world’s greater mountain ranges and keeping a diary of his travels. As a writer he strives to do for mountain history what Bill Bryson did for long-distance hiking. Several of his expedition diaries are available from the major online bookstores. He has published two full-length books: Seven Steps from Snowdon to Everest (2015), about his ten-year journey from hill walker to Everest climber, and Feet and Wheels to Chimborazo (2019), about an expedition to cycle and climb from sea level to the furthest point from the centre of the earth. His favourite mountaineering book is The Ascent of Rum Doodle by W.E. Bowman.