Pan’s Labyrinth: The Labyrinth of the Faun by Guillermo del Toro and Cornelia Funke
Ofelia believes she is nothing more than the daughter of a dead tailor and a woman who has remarried too soon. Ofelia also believes the man her mother wants her to consider her new father is actually a wolf, a capitan who uses his soldiers to feed his thirst for fear and blood. She is right about the second thing. When she arrives at the old mill the capitan has taken over as his base, Ofelia is led by a fairy into an ancient Labyrinth where the Faun tells her she is the princess of the Underworld. If she can complete three tasks by the next full moon, she can return to her real mother and father.
This novel is part fantasy, part fairy tale, where the humans are the most dangerous creatures of all. Set in Spain in 1944, it exposes a side of World War II and the Spanish Civil War that is relatively unknown. Recommended for readers in high school and up.