Are you a fan of Gone Girl, Girl on a Train or Luckiest Girl Alive? Then you'll like The Passenger by Lisa Lutz.
The novel begins with Tanya Dubois' husband dead at the bottom of the stairs. She didn't kill him, but must nonetheless take off because her identity can't withstand close scrutiny by the cops. The rest of the exciting book is about her life on the run, and the slow reveal of the reason she initially had to hide her identity.
The Passenger is an exciting and entertaining read. Check it out!