Pencilvania / Stephanie Watson ; illustrated by Sofia Moore.

Enhanced descriptions from Syndetics:

In this illustrated, modern take on The Phantom Tollbooth meets Harold and the Purple Crayon, author Stephanie Watson beautifully explores grief and creativity through an unforgettable fantasy world.

Ever since she first learned to hold a crayon, Zora Webb has been unstoppable. Zora draws hamsters wearing pajamas and balloons and Lake Superior and pancakes and hundreds of horses. Her drawings fill sketchbooks and cover the walls of the happy home she shares with Frankie and their mother.

But when Zora's mom is diagnosed with leukemia, everything changes. After months of illness, she dies, and with her goes Zora's love of creation. Desperate to escape the pain, Zora scribbles out her artwork. Her dark, furious scribbles lift off the page and yank Zora and Frankie into Pencilvania, a magical world that's home to everything Zora has ever drawn. And one drawing--a scribbled-out horse named Viscardi--is determined to finish the destruction Zora started.

Viscardi kidnaps Frankie, promising to scribble her and all of Pencilvania out at sunrise. Zora sets out to rescue her sister, venturing deep into Pencilvania--a place crawling with memories, dangers, and new friends. If she is to save Frankie, Zora will have to face the darkness that both surrounds her and is inside of her.