The award-winning creator of the hugely popular When You Can Swim delivers another tender and visually stunning picture book about change, family, and saying goodbye.As a young boy prepares with his family to leave their home -- and the koi fish he's always cared for -- his world fills with questions. What will happen to his fish? Will they be safe and happy in their new home? Through his wonder and worry, readers glimpse the universal feelings that come with any life transition: curiosity, uncertainty, and the hope that we will be okay.Lushly illustrated in the tradition of Chinese brush painting, Goodbye, Koi will resonate with any reader who has ever had to say goodbye to a pet, a place, or a way of life.