A boy and his grandmother make a new home on the moon, deeply connected to the cultural roots and family members they were forced to leave behind, in this stirring picture book inspired by the African diaspora from poet Aracelis Girmay. One day, young Kamau and his Grandmother ZZ wake up to find themselves on the moon. Kamau doesn't remember Back Home, but Grandma ZZ does, and she misses it terribly. Together, through memories and dance and letters and song, Kamau and ZZ find a way to make a new life for themselves in this strange land: a new life which is not only rooted in the stories, memories, and traditions that ZZ carries inside her, but which also lovingly reaches out across the vast expanse of space to connect and communicate with the family members from whom they've been separated.