Four friends bond over their love of animals in this animal shelter-set series from Scholastic and American Girl.Sofia loves helping at the animal shelter. But she is finding it increasingly hard to see the adorable dogs and cats leave and find forever homes with other families. Sofia is particularly attached to a puppy she's nicknamed Piper, who is the runt of a litter. One by one, the puppy's brothers and sisters find homes, until only Piper is left. Time is running out! Can she convince her parents that Piper belongs with her before someone else takes him home?