Book excerpt: In the sequel to the New York Times bestselling HEAT WAVE, Richard Castle's new thrilling mystery continues the story of 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. In what's sure to be another smash sensation by blockbuster author Richard Castle, readers will once again follow Nikki Heat and hotshot reporter Jameson Rook as they trade barbs and innuendos all while on the trail of a murderer!