Skulduggery Pleasant (Skulduggery Pleasant, (1)) (Book 1)

She’s twelve. He’s dead. But together they’re going to save the world. Hopefully.
The iconic first book in the bestselling Skulduggery Pleasant series.
Stephanie's uncle Gordon is a writer of horror fiction. But when he dies and leaves her his estate, Stephanie learns that while he may have written horror, it certainly wasn't fiction.
Pursued by evil forces, Stephanie finds help from an unusual source – the wisecracking skeleton of a dead sorcerer…