A mysterious fire at a notorious hotel unearths a body, and years later, a cryptic clue in a notebook links it to a brutal attack on a police officer. Inspector John Rebus finds himself drawn into a cold case when a young officer is ambushed, his investigation revealing a connection to a fire that destroyed the Central Hotel five years prior. The charred remains found in the ashes, identified only by a bullet wound, and a cryptic entry in a black notebook belonging to the injured officer, suggest a deeper conspiracy. Rebus must navigate layers of deceit and uncover buried secrets to understand what the young detective learned that made him a target.

The Black Book is the fifth novel in Ian Rankin's Inspector Rebus series, and it is generally well-regarded within the crime fiction genre. Readers often praise Rankin's atmospheric portrayal of Edinburgh and his complex characterizations, particularly of Rebus himself. The novel is noted for its intricate plotting, weaving together past and present events to create a compelling mystery. Critical reception typically highlights the series' consistent quality and Rankin's skill in crafting gritty, engaging police procedurals.