Shadowed - Karen E. Olson

Computer hacker 'Nicole Jones' finds herself on the run from an unknown enemy in this tense and twisting novel of identity and suspenseThe computer hacker formerly known as Nicole Jones is now living as Susan McQueen on a remote island in Quebec, Canada. She is living a quiet life, working as an artist - but she has not given up her computer. While in an online chatroom, she sees a shadow - someone is inside her laptop, watching her every move, and somehow knows exactly who she is. Afraid that he will track her down, Susan is on the run again - but from whom? Is it the FBI or someone associated with her past crime sixteen years before? Making her way across the border and back to the USA, some unsettling discoveries make Susan realize that she won't be able to escape her past a second time.