Press release A missing twin. A sinister retreat. A race across time. January 19, 2026

When her sister vanishes into a mysterious wellness facility, one woman will risk everything to uncover the truth in Bonnie Traymore's chilling new psychological thriller.

London, January 2026 – dp books is delighted to announce the upcoming release of The Good Sister, a gripping new psychological thriller by Bonnie Traymore, the Amazon bestselling and award-winning author of acclaimed domestic suspense novels. Twisty, emotionally charged and deeply unsettling, the novel explores the dark side of sisterhood, identity and the price of unconditional love.

Casey and Nora are mirror twins – alike in appearance but opposite in almost every other way. So when the high-strung Nora disappears after a fight with her husband, Casey tries to believe it's just another dramatic exit. But something feels wrong. A private investigator soon uncovers that Nora has been lured through the dark web to a mysterious organisation promising to erase pain and deliver eternal bliss… for a price.

Following her trail to a remote wellness retreat in Mexico, Casey risks everything to find her sister. But what she discovers in far more dangerous than anything she could ever have imagined.

Bestselling author Bonnie Traymore blends the emotional intensity of domestic suspense with the unsettling atmosphere of psychological thrillers, appealing to the audiences of Freida McFadden, Shari Lapena and Charlie Donlea. Her novels feature complex, relatable protagonists and explore the hidden tensions beneath American domestic life, weaving together themes of jealousy, infidelity, murder and psychological trauma with the occasional touches of dark humour.

Described as "gripping and impossible to put down" by bestseller Caleb Stephens, The Good Sister is now available for pre-order on Amazon and Kindle Unlimited, with official release set for 16th April 2026. Click here to learn more.