Raging Heat is Richard Castle's sixth Nikki Heat book.
- Author: Richard Castle
- Hardcover: 304 pages
- Publisher: Kingswell (ABC)
- Release Date: September 16, 2014
- Language: English
- ISBN: 978-1-4847-2034-9
- Nikki Heat - a tough and intelligent Homicide Detective who drove her career towards the NYPD in order to find her mother's killer. She is modeled after Kate Beckett.
- Jameson Rook - Heat's boyfriend and a world-renowned journalist with First Press magazine who met Nikki when he was assigned to shadow the 20th precinct for an assignment on NYPD Detectives. He is modeled after Richard Castle.
- Detective Miguel Ochoa - a member of the 20th precinct's Homicide Division working with Nikki. He is modeled after Javier Esposito.
- Detective Sean Raley - a member of the 20th precinct's Homicide Division and Detective Ochoa's partner. He is modeled after Kevin Ryan. He is known as the King of All Media Surveillance for his talent at noticing case-breaking details in hours of boring surveillance video.
- Lauren Parry - a Medical Examiner and Nikki's best friend who maintains a warm outlook despite her chosen profession. She is modeled after Lanie Parish.
- Detective Randall Feller: The newest member of Nikki's squad, who transferred from the Taxi Unit.
- Detective Dan Rhymer: A Burglary cop whose nickname is "Opie" because of his Southern accent.
References to Castle Episodes, Cast, and Crew
- As Nikki Heat approaches the crime scene at the planetarium, she sees a coach bus with Edmonton license plates. Nathan Fillion, who plays Richard Castle, is originally from Edmonton, Alberta, Canada.
- In talking to Lauren Parry at the planetarium crime scene, she says she recently worked a case where someone committed suicide "in the Bronx at the Castle Hill Houses." Castle is a reference to Richard Castle and the TV show Castle.
- In describing the history between Rook and Heat, the book says "Heat went from trying to get him [Rook] reassigned because his pigtail-pulling wisecracks annoyed her..." In Sucker Punch, Beckett tells Castle that she's "gotten used to you pulling my pigtails." It also says that after his article about Nikki and her colleagues was published, Nikki kept him around to work cases with her and her team, just like Beckett kept Castle on as an NYPD consultant.
- At one point Nikki admonishes he team not to joke around at the planetarium crime scene too much or they'll find themselves embarrassed "on the cover of this afternoon's Ledger. " The New York Ledger is a newspaper frequently mentioned in Castle.
- Ochoa admits to having been "Airborne" when he previously served in the military. Jon Huertas is also former Air Force.
- The victim who falls through the planetarium roof is reminiscent of the victim wearing the Santa suit who fell from the sky in Secret Santa.
- In chapter one, Rook is comparing himself to various G.I. Joe figures, and eventually settles on a figure whose code name is "Firefly." He admits to Nikki "I sort of feel a connection to him. Can't explain it." Firefly was the TV-series Nathan Fillion starred in and for which he gained a cult following.
- At one point, Nikki finds a Comic-Con baseball cap of Rook's accidentally thrown in a garbage can. Nathan Fillion frequently attends Comic Cons.
- Detective Ochoa, teasing Rook about his crazy theories of what happened to victims, suggests the victim was "a Close Encounters castaway," a reference to Close Encounters of the Murderous Kind.
- In this book, Nikki is up for a promotion that would require frequent worldwide travel, taking her away from Rook, but she hides the fact from him, just like at the end of season 5 when Beckett interviews for a job in Washington, DC without telling Castle.