When Aref, a third-grader who lives in Muscat, Oman, refuses to pack his suitcase and prepare to move to Michigan, his mother asks for help from his grandfather, his Siddi, who takes Aref around the country, storing up memories he can carry with him to anew home.

"Usha lives in a town where the sun hasn't shone for as long as anyone can remember. Only her grandfather remembers its brilliance and tells Usha stories about the time before other people took the sun away, building a wall to keep it all to themselves. So Usha decides to do something, and sets off in search of the sun. When at last Usha reaches the wall, she tries to kick it down, climb it, yell her way through it--but the bricks don't budge. It's...