Ghost sudoku

After spending two weeks hiding out from the media for some R&R, Liza returns home to find her PR still going strong. She knows she has some fans in the sudoku world, but who would plaster her face all over town with the slogan "Kelly for Mayor"? When Liza turns to an old classmate to find out who is behind these political shenanigans, Liza discovers that he's been murdered and that his terrifying problems have now become hers. Still, he's left his share of clues behind. Liza needs to unravel them fast, before someone uses her run for mayor to run her into the ground.