Caroline stares blankly at the puzzle book that lands in front of her. She's not dead, but he did throw the book at her. She lets out a quiet hysterical giggle.

Fortunately, the Riddler is swooping out the door with his ill-gotten money. For lack of anything better to do, she reaches for the book and pulls it to her. She expects crosswords, but gets... Sudoku.

She doesn't even like sudoku.