A Man Unknown

The first book of a Suspence/Thriller Trilogy. When Susan Walker is involved in a car accident, her life completely changes. Her new life is going nowhere until one day she meets Steven and with her father's influence her life changes for the better. Michelle, Susan's older sister is not fond of Steven and is suspicious of all the strange events that occur since meeting him. There are fires and murders and mystery abounds. The Walker family endure murder and mystery ever since Steven has entered their life but nobody is concerned except for Michelle. Michelle, a Detective has to convince Susan that this unknown man may be behind the murders and fires, but Susan won't have it. Will Michelle be able to prove that Steven is the unknown man doing the crimes or is she wrong?