ISBN-13: 9781493649143 / Angielski / Miękka / 2013 / 44 str.
Koku dreams of being a professional baseball player, so he is excited when his parents buy him a baseball cap. But he spends so much time practicing and playing baseball that he forgets about his little sister, Kokuboro. Kokuboro hides his hat, but then it disappears Can this brother and sister work together to find the missing hat and have fun together again?