After her boss at the Cracked Spine bookstore leaves town on secret business, Delaney is called upon to guide his yearly literary tour around Edinburgh. On the first night, the inn manager is pushed off the roof and one of the tour members disappears, leaving a trail of puzzles in her wake. In her eighth adventure (following The Burning Pages), Delaney explores the sights from Greyfriars Bobby to the Sir Walter Scott Monument, but as she looks for clues, someone is looking for her.