In 1999, after a series of wildly adventurous jobs around the world, Sam Sheridan found himself in Australia, loaded with cash and intent on not working until heâ€™d spent it all. It occurred to him that, without distractions, he could finally indulge a long-dormant obsession:Â fighting. Within a year, he was in Bangkok training with the greatest fighter in muay Thai (Thai kickboxing) history and stepping through the ropes for a professional bout. That one fight wasnâ€™t enough. Sheridan set out to test himself on an epic journey into how and why we fight, facing Olympic boxers, Brazilian jiu-jitsu stars, and Ultimate Fighting champions. Along the way, Sheridan delivers an insightful look at violence as a career and a spectator sport, a behind-the-pageantry glimpse of athletes at the top of their terrifying game.Â An extraordinary combination of gonzo journalism and participatory sports writing, A Fighterâ€™s Heart is a dizzying first-hand account of what itâ€™s like to reach the peak of finely disciplined personal aggression, to hitÂ—and be hit.