The Supergirls Universe — A Universe from the Mind of Megumi Kashuahara

When fifteen-year-old Melissa Johnson submits a question card at Princeton's Public Math Night, professor Samuel Patterson doesn't just ignore it — he rips it apart in front of eight hundred people and calls her a project girl who wandered in off the street. She doesn't sit down. What follows is the story of a girl from Newark who taught herself calculus from library books, learned German to read a two-hundred-year-old manuscript, and found the door that sixty brilliant mathematicians couldn't / (Reviews)

When tech billionaire Malcom Forbes is abandoned by his attorney mid-trial, facing a murder conviction built on impossible evidence, the courtroom falls silent for three seconds. Then an eight-year-old girl from Ten Pines stands up. Camika Foster has been watching. Taking notes. Asking questions nobody thought to ask. And she's about to prove that the most dangerous person in a room full of powerful liars isn't the one with the best lawyer. It's the one paying attention. I Can Defend Him.