Going, Going, Dragon!: Book 6 — Colleen A.F. Venable

Sasspants, Hamisher, and company have never had it so good. Now that Mr. Venezi's Pets and Stuff doesn't actually sell pets, everybody has time to explore other interests. There's scuba diving in the fish tank with the Steves, theatrical performances with the mice, and walrus toothbrushes and aardvark neckties for everyone! It's not all good times, though. Mr. Venezi's been mistaking his bills for fan mail and a dragon may have moved into the shop. Can Sasspants and Hamisher ensure that a "happily ever after" is in store for the animals, Mr. Venezi, Viola…and even that nice lady from the bookshop next door?