The Deadening by Kerry Peresta

Olivia Callahan’s quiet, orderly life is shattered when she regains consciousness in a hospital and discovers she is paralyzed and cannot remember a thing. The fragmented voices she hears around her help her piece together that an apparent assault landed her in the hospital, but nobody knows who attacked her, or why. After a chilling struggle to survive, she awakens from a coma unable to remember what happened to her or anything at all, except she has been told she is an entirely different person. Or is she?

Now, in spite of a brain injury that has rewired her personality, Olivia is on a mission to reclaim her life. As clarity surfaces and she starts to understand who she was, she is shocked. Had she really been that person? And if so, does she want her old life back?