3 Books Found

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Based on your description:

"Mystery book where one twin sister goes missing and her twin sister visits their childhood home. The missing sister's partner meets the twin and they try to find her"

August 9, 2026

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Likely answer

Mystery Thriller About Twin Sisters and a Secret Childhood Home

In Carole Johnstone's "Mirrorland", Catriona returns to her childhood home in Edinburgh after her estranged identical twin sister, El, goes missing. Upon arriving, she encounters El's husband, Ross, and the two begin to unravel the mystery of El's disappearance. The story explores the dark, imaginary world the sisters created as children to escape their reality, blurring the lines between past and present.

Confirmed match: Mirrorland by Carole Johnstone