Livey's younger brother, Darby, a math genius, brings his imaginary friend to life through a mathematical proof. Bob is a creature of pure math, and he hates chaos and disorder. Now Livey, Darby, and some very unique allies must band together to find a way to stop Bob—before he fixes our disorderly world for good. Monster's Proof brings horror and math together in an unforgettable novel that will forever change the way you look at an equation.