Joe Simpson is a British mountaineer, author, and motivational speaker. While climbing in Peru in 1985, he suffered severe injuries and was assumed dead by his climbing companion Simon Yates after falling into a crevasse, but he survived and managed to crawl back to his base camp. He described the ordeal in his 1988 book Touching the Void, which has been adapted into a 2003 documentary film and a 2018 stage play, both of the same name.

Touching the Void is a 1988 book by Joe Simpson, recounting his and Simon Yates's near fatal descent after climbing the 6,344-metre (20,814 ft) peak Siula Grande in the Peruvian Andes. Approximately 15% of the book is written by Yates. It has sold over a million copies and has been translated into over 20 languages.