The Monster in the Mirror — Anthony Wacholtz

Lately, whenever Anders Carter looks in a mirror, he sees more than his own reflection. Each shiny surface, whether a bathroom mirror, a store window, or a harmless rain puddle, fills him with spine-tingling, hair-raising dread. He sees things in these reflections--things he can't explain but knows to be evil. And no one will believe him! So Anders decides to face his fear all by himself, before the monstrous images take on a sinister life of their own.