Miss Bianca (1962 book)

Miss Bianca is the 2nd novel in The Rescuers book series written by the late British writer Margery Sharp ,it would become the basis for the 1977 Disney animated film "The Rescuers". 
=== Summary ===
Miss Bianca, the elegant mouse Chairwoman of the famed Prisoners' Aid Society, drew in her breath. "The prisoner," she said gravely, "is a little girl of eight named Patience. She has been kidnapped by the wicked Grand Duchess and is imprisoned in the Diamond Palace." Careful plans for the rescue are laid, but even the best plans can go wrong. Luckily Miss Bianca has more than her share of wiles and wit.
=== Plot ===
Miss Bianca discovers that the latest call from help to the Prisoners Aid Society comes from a little girl named Patience, a 8 year old orphan who is forced to work for a evil Duchess who makes her polish her diamonds.