Summer fading new friends' faces lighten the way home. Summer has arrived — and so has Koo, Stillwater the Panda's haiku-speaking young nephew. When Stillwater encourages Koo and their friends Addy, Michael, and Karl to help a grouchy neighbor in need, their efforts are rewarded in unexpected ways. Jon J. Muth's warm, engaging story and his luminous watercolors are as fresh and magica…