Running is one of the most popular and accessible sports in the world. From jogs around the block to ultra-marathons, different runners set the pace in their own ways. On the Run sets out to educate and inspire runners of all experience levels, giving an inside look at the history of races and clubs around the world while demystifying the science of the body. It's written by Nick Butter, a British long-distance runner, adventurer, and motivational speaker. He has a hefty resumé, too—in 2019, he became the first person ever to run a marathon in every country in the world, doing so in just 23 months.