Skulduggery Pleasant is back, and reunited with his original head. But all is not well in the magical world - for one thing, foreign powers are conspiring to take over the Irish Sanctuary, and for another thing, Valkyrie has discovered she might be the sorceress set to destroy the world. The problem is, she doesn't feel she can tell Skulduggery what she's learned... and that's how all the trouble starts.
