The Invisible Fran(Franny K. Stein, Mad Scientist‪)‬

In this episode of Jim Benton's New York Times bestselling series, the classmates of Franny K. Stein show no appreciation for her passion-mad science. Even when Franny displays her two-headed robot, they show little interest. But after Franny makes herself invisible and whispers robot-improving suggestions, a few kids believe they've actually become mad scientists and cause the robot to run amuck. And as it's poised to destroy the library, Franny must think quickly to save the valuable books from stupidity gone wild.