Zia erases the world

"Zia remembers the exact night the Shadoom arrived. One moment she was laughing with her best friends, and the next a dark room of shadows had crept into her chest. Until Zia discovers an old family heirloom: the C. Scuro Dictionary--Hidden within its magical pages is a mysterious blue eraser. When Zia starts to erase words that remind her of the Shadoom, they disappear one by one from the world around her. But things quickly dissolve into chaos, as the words she erases turn out to be more vital than Zia knew"--Provided by publisher.