The Fairy-Tale Detectives is the first book in a series about the Sisters Grimm. Sabrina and Daphne Grimm have been shuffled around from foster home to foster home and back and forth to an orphanage after their parents just disappeared. Ms. Smirt, their caseworker, delivers the girls to a woman claiming to be Grandma Grimm. Sabrina, the eldest, is skeptical that this woman is her grandmother because her father never talked about her. Daphne likes the kind but strange old woman who takes them to live with her, Mr. Canis (her assistant) and a Great Dane named Elvis. The town of Ferryport Landing isn’t like most towns and Grandma Grimm has lots of rules, secrets and locked rooms in her home, weird things happen around the house, and odd people keep visiting Relda Grimm. Grandma Grimm informs the girls that they are the descendants of the Brothers Grimm, the ones who wrote the fairy-tales and they are not tales but true incidents. Now Sabrina believes that the old woman is crazy and decides to run away from Ferryport Landing the first chance they get.
Despereaux Tilling is a small, sickly mouse with big ears who breaks all the Mouse Council rules by interacting with humans. Interacting with humans is potentially dangerous for mice that live in castles, so when Despereaux falls in love with Princess Pea, the Mouse Council sentences him to death by the rats that live in the castle’s dungeon. Despereaux is a brave and special mouse. Will his love of the princess conquer the obstacles he must face?