Nancy Drew: Notebooks #12: The Puppy Problem by Carolyn Keene (1996)

Paperback in Very Good condition. A little puppy is turning into a big problem!Nancy's wish has finally come she has a dog of her own. She's a chocolate-colored Labrador retriever, and she's fun and friendly and loves to play. But the pup's also in a sticky situation -- and its up to Nancy to save her.Hannah's fresh-baked muffins have vanished, and a food thief is loose in the neighborhood. And guess who's getting blamed? Nancy's new puppy. It's so unfair, and she's going to prove it...by finding the real thief!