Sybil Foxglove has always been quiet. As a girl, she fled the drunken rages of her father; as a wife, she endures the stifling cruelty of railway investor Johnny Arthur Lee—whose outward charm lured her into marriage, only to find her terrorized behind closed doors. In the confines of Johnny’s home, Thistle Grove, Sybil’s tortured silence morphs into something darker—and indistinguishable from madness. Yet, even as she spirals into her undoing, one thing is abundantly clear: as long as her husband controls the trajectory of her existence, she is doomed to a life of misery and mistreatment. In letters to her lawyer, Mr. Boyd—the man chosen to defend her in her murder trial—Sybil reveals what she endured, what she did in retaliation, and why she will never say the words “I’m sorry” again. Dear Mr. Boyd is a haunting confessional of rage, resilience, and broken silence.