"Peter and Ernesto are sloths. Peter and Ernesto are friends. Peter and Ernesto are nothing alike. Peter loves their tree and never wants to leave, while Ernesto loves the sky and wants to see it from every place on earth. So Ernesto leaves to have a grand adventure, and Peter stays behind and frets. Will their separation tear these friends apart...or can it bring them closer together?"--Page 4 of cover.