If you’re a fan of books with an unreliable narrator, you’re in luck with Catherine Wimpeney’s debut thriller. She draws on her experiences and insights as a psychotherapist to create a nuanced portrait of a woman with profound and initially unappreciated mental health challenges.
Kay is a Senior Investigating Officer in the Manchester police force, a bit uneasy with her partner, DI Matt Anderson, whom she believes is too ambitious (wants her job), and with their commanding officer, Barbara Dean (may give it to him). Granted, Kay seems more than a bit paranoid when she sees Matt and Barbara talking with each other. But she’s been in a shaky mental state since her older sister Helen’s suicide.
About ten months earlier, Helen jumped to her death from a parking structure. Helen suffered from depression for many years, but Kay never anticipated she’d do this. Kay knows she played a role in Helen’s troubled psychiatric history, which contributes to her grief and guilt over Helen’s death. Kay has missed a number of appointments with the therapist her department hoped would get her back on track. That, combined with Kay’s current somewhat erratic mental state, convinces Barbara to require that she take some time off.
Fate seems to play a cruel trick on Kay when she spots another woman at the top of a parking structure, looking prepared to jump. She rushes to the woman’s aid. If she couldn’t save her sister, perhaps she can save this woman. The woman’s name is Ava, and Kay finally talks her down. Ava’s reveals she’s being tormented by her ex-husband, Adrian McGrath, a wealthy property developer. She is terrified of him and the men he has following her. To Kay’s surprise, she knows McGrath, whom she holds partly responsible for the torture death of a young boy.
Kay planned to pursue her mental health recovery in Scotland at a vacation home that’s been in her family for generations. Quiet. Fabulous views. Now, she invites Ava to join her. No one will have a clue that’s where she’s hiding.
Author Wimpeney delves into a lot of backstory, not just about Kay, but Adrian too, and I’m not sure all of it was necessary. She made a good choice in letting Kay narrate most of the story in first-person. You get a strong sense of her perspective, which makes the book work. A few very short chapters take other points of view, but make the narration feel choppy.
When Kay finds Helen’s journal in the vacation house and begins to read, her mental state is stressed almost beyond endurance. The pressure on Kay continues to mount—protecting Ava, salvaging her career, repairing relationships, dealing with Adrian, heading off a nosy reporter.
Her Sister’s Shadow is unquestionably a psychological thriller, and you may conclude it emphasizes the psychological elements at the expense of the thriller elements. Yet, the unpredictable consequences of Kay’s mental state will keep the pages turning.