Yumi and the Nightmare Painter by Brandon Sanderson

#1 New York Times bestselling author Brandon Sanderson brings us a gripping story set in the Cosmere universe told by Hoid, where two people from incredibly different worlds must compromise and work together to save their worlds from ruin.

Yumi comes from a land of gardens, meditation, and spirits, while Painter lives in a world of darkness, technology, and nightmares. When their lives suddenly become intertwined in strange ways, can they put aside their differences and work together to uncover the mysteries of their situation and save each other's communities from certain disaster?