City Dog, Country Frog by Mo Willems and Jon J. Muth
“From two Caldecott Honorees comes a heartfelt meditation on time and the lasting impact of friendship. In spring, newly arrived City Dog meets Country Frog, who teaches him Country Frog games. In summer, Country Frog learns some City Dog games. As the days grow short in the fall, City Dog and Country Frog spend hours …