I'm such a sucker for literary characters showing up in other stories...

The Heroines: a novel by Eileen Favorite
At 13, Penny craves attention from her mother, who runs a quaint bed and breakfast on the plains of Illinois. Some of the visitors are normal, but occasionally a literary heroine (Madame Bovary, Scarlett O'Hara) finds comfort and retreat there before returning to the tumult of her story. When Penny ignores her mother's warnings about exploring the nearby woods, she finds more trouble (and characters and plots) than she anticipated....
I checked it out. 233 pages.