John Volanthen is a world record-holding British cave diver who has been at the forefront of underground rescue and exploration over the last two decades. In 2018, John played a key role in the Tham Luang Thailand cave rescue, and has been involved in a number of search, rescue, and recovery incidents around the world. Living in Bristol, John spends his ‘spare’ time running ultra marathons. John’s book, Thirteen Lessons that Saved Thirteen Lives, was published by Aurum in May 2021.