Didi Oviatt 
Aggravated Momentum [EPUB ebook] 

After sisters Markie and Kam get tangled with the wrong people at the wrong time, long-buried family secrets begin to emerge.
A serial killer is targeting people close to them. As danger inches closer and closer to home, twisted desires become a reality. The deeper they dig, the darker the secrets they find.
But who is the cold, calculated murderer, and can they find a way to survive?