A hidden bond. A deadly betrayal…When Arabella discovers she was adopted after her mother's death, her perfect life begins to crack. A hidden twin, a birth mother lost too soon, and a spiralling sense of jealousy pull her into a storm of obsession and self-destruction. Helen, reeling from her own loss and starting over in a quiet Cornish town, meets Arabella by chance. Their connection is instant – two grieving women offering each other comfort. But when Arabella disappears to seek help for her unravelling mind, Helen is drawn into her home, her family...and her life. As sinister events escalate and buried truths surface, Helen begins to question everything: the strange illness consuming Arabella, the charming husband too quick to confide, and the secrets hiding behind locked doors. By the time Helen uncovers the truth, it may already be too late. Dark, twisty, and addictive, Good Sister, Bad Sister is a gripping psychological thriller about sisterhood, obsession, and how far we’ll go to rewrite the past.
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