This is the fifth book in the Spiderwick Chronicles series.
Soon after outwitting the dwarves to escape, they find their home is in ruins. Mulgarath had taken their mother and the book! Jared, Simon, and Mallory Grace, with the help of Byron the Griffin, Thimbletack, and Hogsqueal set out to save their mother.
Rating: 6/10 – They killed dragons in this story. Very sad.