Halloween has always been tricky for Charly, but this year they are determined to find a costume that represents their feminine and masculine identities equally. Digging through their costume box, Charly finds many fun costumes that could be for either girls or boys, but they all miss the mark. With trick-or-treat looming, they must think outside the box to find the perfect costume--a costume that will allow them to present as one hundred percent Charly. As the world recognizes and welcomes diverse and intersecting identities, children are the most in need of freedom to explore and learn how to build a better, more inclusive society. This delightful, affirming picture book delivers a message that is accessible, educational, positive, and inclusive.