The Last Thing He Told Me by Laura Dave

Before Owen Michaels disappears he smuggles a note to his beloved wife of one year: Protect her. Despite her confusion and fear, Hannah Hall knows to whom the note refers—Owen’s sixteen-year-old daughter, Bailey, who lost her mother tragically as a child and wants nothing to do with her new stepmother.

As Hannah’s increasingly desperate calls to Owen go unanswered, as the FBI arrests Owen’s boss, as a U.S. marshal and federal agents arrive at her Sausalito home unannounced, Hannah quickly realizes her husband isn’t who he said he was. Bailey just may hold the key to figuring out Owen’s true identity—and why he really disappeared.