"Concrete Jungle" by Jason Clark is a crime thriller centered on Detective Ava Thorne of the NYPD. The narrative opens with Ava grappling with a five-year-old unsolved case, the "Lazarus case," and the lingering guilt it has caused. A mysterious phone call draws her back into the city's dark underbelly, revealing the death of Elias Vance, a prime suspect from the Lazarus case, and a cryptic message about a continuing "game." This leads her to the murder scene of Arthur Blackwood, a wealthy and influential man, in his luxurious penthouse apartment. The scene is meticulously staged, suggesting a calculated execution rather than a robbery. Ava's investigation uncovers a web of complex business dealings, political connections, and potential suspects, including Blackwood's wife, Eleanor, and his business rival, Victor Martel. The narrative progresses through forensic examinations, witness interviews, and the meticulous gathering of evidence, revealing a pattern of corruption and conspiracy. Ava goes undercover as "Seraphina" in a high-stakes poker game to gather intel on the city's elite, uncovering a secret offshore account linked to Blackwood. The story emphasizes the city's dark underbelly, the intricate connections between wealth, power, and crime, and Ava's relentless pursuit of justice, even as she confronts her past demons. The description concludes with the revelation of Marco "The Razor" Rossi's name, a name that causes Ava great unease.