You can start by checking out your local library. They may have some of her novels in their collection. If not, you can look on online bookstores like Amazon. They usually have a wide selection of Devney Perry's books.
I'm not certain who Perry is in 'the good perry bedtime stories' without more information. Perry could be the author of these bedtime stories, or perhaps it's the name of a character that the stories revolve around, like a wise old owl named Perry who tells the other animals in the forest different stories every night.
It could be based on real events, but it might also have fictional elements mixed in. Sometimes movies or stories draw inspiration from real-life but take creative liberties.
I'm not sure specifically as there could be many stories related to 'Bluff City'. It might be about some real - life events, people, or a particular aspect of a place known as Bluff City. Without more context, it's hard to say exactly.