Each book in this series is the same! At this point, they’re just looking for excuses to sell the same book several times. It’s always the same boring plot. Some girl stumbles upon a magical puppy that can talk. The girl agrees to care for it and keep it hidden. The majority of the plot is just the girl playing with the puppy while trying to keep it secret. Then, at the end the puppy always says they have to leave now. The end!
It’s not ideal even for a five year old! Try to change the story a little bit next time, instead of reselling the same book with different characters.