Landy, Derek. Skulduggery Pleasant #bk. 16

A murder. A mystery.​ Two murders, actually. Well, three, if you're counting. Oh, look, here comes a fourth . . .​ So much murder that skeleton detective Skulduggery Pleasant must annoy Valkyrie Cain, the infamous Destroyer of Worlds, with his incredible deduction abilities at every available opportunity. As Valkyrie's irritation grows, the detectives sink deeper into a hidden world of dark motivations, festering hatred and unimaginable pain. ​ And a teensy bit more murder

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