Can a puppy grow up into a girl? Aleasha Ann Davidson does just that in this entertaining, simple chapter book. Aleasha, who narrates, describes her arrival in the household as an Australian shepherd puppy. Nick, who had wanted a brother or sister, quickly adjusts to his pet, but his pet's adjustment surprises the whole family. With a puppy's reasoning, Aleasha decides that being human would be more fun and in the course of the book, with comic incidents along the way, turns into an affectionate seven-year-old girl. Children may be bothered by the way Aleasha can repeat and understand words from puppyhood, at the same time explaining to readers that she doesn't, in fact, comprehend much of what she has heard. It's not the only gap in logic, but the story has the appeal of a good family read-aloud, regardless of its imperfections. (Fiction. 7-11)