A crucial subversion of the misconceptions around the participation of gender diverse athletes -- advocating for the inclusion of trans and nonbinary athletes across all levels of sport. The debate over the inclusion of gender diverse people in sport has become the latest battleground in the fight for basic human rights and equality. Trans and nonbinary people around the world are facing physical harm and violence -- including death -- at unprecedented rates. In Let Us Play, trans athlete Harrison Browne and investigative journalist Rachel Browne reveal how the opposition towards gender diverse athletes is fueled by fear and a moral panic as opposed to facts around what makes "a level playing field." Interweaving Harrison's first-hand experience as a transgender athlete with exclusive accounts -- from athletes, coaches, policymakers, and advocates on the front lines -- Let Us Play dismantles the illusion that sports have ever been fair, that trans athletes pose a threat to women's sports, and that gender-affirming healthcare for athletes should be prohibitive to play. Calling for a reframing of the binaries from youth and high school levels all the way to the national leagues, Browne and Browne offer a new path forward, led by solutions proposed by gender diverse athletes themselves.