Gustavo, the Shy Ghost meets How the Grinch Stole Christmas! by way of Persian myth in this sweet picture book about two young monsters who set out to make mischief in the human world during winter solstice celebrations.

On the darkest, coldest, and longest night of the year, twin divs Choori and Shooli are on a mission to wreak mischief and mayhem during a family's Yalda Night. But no matter what they do, the family still manages to have their fun, and the little divs learn that the human spirit is hard to break--and that's something worth celebrating.