Join 13-year-old Jessie as she keeps a diary of her class's yearlong research project on superheroes, which culminates in the Superhero Slam: a head-to-head debate battle It's shy, comics-obsessed Jessie's dream come true . . . and worst nightmare. She decides to champion Batgirl, a regular person (albeit with major talent and training under her utility belt), and soon Jessie wonders what it would take to be Batgirl. Will she prove to her best friends,...