Killer Heat is the 10th in the series centering around Alexandra Cooper Asst DA for Special Victims in NYC. This book's main story line revolves around a serial rapist/murder and the efforts taken to apprehend the perpetrator. There is a subplot which is cleverly woven in to misdirect the reader and keep the tension throughout. The characters have been well-developed over the previous 9 novels and interact as expected. The behavior of the central character is beginning to become a bit predictable and therefore, removes some of the suspense that could normally be generated in this type of plot. But all in all, I enjoyed the book.