HEAT WAVE is a tie-in to the ABC primetime show, CASTLE, that premiered in March 2009. The main character of the show, Richard Castle, is a bestselling mystery writer. HEAT WAVE is his next book: Mystery sensation Richard Castle, blockbuster author of the wildly best-selling Derrick Storm novels, introduces his newest character, NYPD Homicide Detective Nikki Heat. Tough, sexy, professional, Nikki Heat carries a passion for justice as she leads one of New York City's top homicide squads. She's hit with an unexpected challenge when the commissioner assigns superstar magazine journalist Jameson Rook to ride along with her to research an article on New York's Finest. Pulitzer Prize-winning Rook is as much a handful as he is handsome. His wise-cracking and meddling aren't her only problems. As she works to unravel the secrets of the murdered real estate tycoon, she must also confront the spark between them.