Skullduggery Pleasant: dead or alive. Derek Landy. 2021.

Billions of lives will be wiped away in a final, desperate search for the Child of the Faceless Ones, she who is destined to bring about the return of humankind’s ancient overlords.

To prevent this, Skulduggery Pleasant and Valkyrie Cain have one last - terrible - option: the assassination of Damocles Creed . With protests stirring in the magical city of Roarhaven, Valkyrie must decide who she wants to Ben: the hero who risks everything for a noble ideal, or the killer who sacrifices her own soul for the fate of humanity.