Sidney, Stella, and the MoonBook - 2013
Twins Sidney and Stella love doing everything together. Everything except share. When a quarrel over a bouncy ball spells cosmic disaster, the twins must face their biggest-ever challenge: working together to find a new moon!
Publisher: Somerville, MA : Templar Books, 2013
Edition: First U.S. ed
Characteristics:  p. : col. ill. ; 30 cm