A mystery story with a monstrous twist

In book three of the series, Sabrina and Daphne Grimm tackle their most important mystery: Who kidnapped their parents more than a year ago? Sabrina enters the hideout of the Scarlet Hand, the sinister group of Everafters who are keeping her parents prisoner. She has a chance to rescue her mom and dad but is foiled by the most famous fairy-tale character in the world. With the help of her little sister (who might be tougher than Sabrina realizes) and a long-lost relative, Sabrina finds a powerful weapon for fighting her enemies, and discovers that magic has a high price.

שם הספר
The sisters grimm; the fairy-tale detectives
NERDS: National Espionage, Rescue, and Defense Society (Book One)
The Problem Child (The Sisters Grimm, Book 3)
The Fairy Tale Detectives (The Sisters Grimm, Book 1)
The Unusual Suspects (The Sisters Grimm, Book 2)