The Twenty-Three (Promise Falls Trilogy)

In the gripping finale of the Promise Falls Trilogy by Linwood Barclay, the small town faces a deadly flu-like virus outbreak. Investigator Cal Weaver uncovers mass poisoning linked to a tainted water supply, while Detective Barry Duckworth connects a murder to past unsolved cases. The number 23 emerges as a sinister motive, leading to deadly revelations.