Deadly Heat by Richard Castle

Determined to find justice for her mother, top NYPD Homicide Detective Nikki Heat continues to pursue the elusive former CIA station chief who ordered her execution over a decade ago. For the hunt, Nikki teams once again with her romantic partner, Pulitzer Prize-winning investigative journalist Jameson Rook. Their quest for the old spy and the motive behind the past murder unearths an alarming terror plot - which is anything but ancient history. It is lethal. It is now. And it has already entered its countdown phase.

This Nikki Heat book has more international/spy intrigue. It was fun to read and flows well with the previous books in the series.

Nikki Heat is still trying to solve her mother's murder and is seemingly closing in when a serial murderer seems intent on playing games with her. Another pair of investigators come on the scene and disrupt her as well. It seems that Rook and the female investigator have had a relationship in the past. Nikki has to put her dislike of her to cooperate with them to solve the serial killer's murder. This serial killer seemingly is tied up with her mother's case and everything is getting muddy. I enjoyed the interaction between Heat and Rook as well as her team. It helps that I can put faces to the characters as they are acting very true to the tv show.