From as early as she can remember, Regan O’Neill has known that her brother Liam was different.That he was, in fact,a girl.Transgender.Having a transgender brother has never been a problem for Regan—until now.Liam (or Luna,as she prefers to be called by her chosen name) is about to transition. What does it mean,transitioning? Dressing like a girl? In public? Does Liam expect Regan to embrace this decision, to welcome his sex change? She’s always kept her brother’s secret, always been his confidante,but now Regan’s acceptance and love will be put to the test.