Killer Genius 2 by Steven Van Patten

After being forced to fake her death, Kendra the Killer Genius was going to take a break from terrorizing New Yorks racists, morons, and bullies. But when a pair of sexual deviants armed with advanced technology and ties to the Russian mob threaten her favorite police detective, Kendra declares war. The only thing that grows higher than the tension is the body count...