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Not My Sister: A completely gripping psychological thriller with an addictive twist
Paperback
ISBN13: 9781836180838
Publisher: Bookouture
Published: Mar 4 2026
Pages: 354
Weight: 0.76
Height: 0.79 Width: 5.06 Depth: 7.81
Language: English
My missing sister is at my door. She's in my home. She's not who she says she is.
When my thirteen-year-old sister Lydia vanished, all they ever found was her purple, space-themed schoolbag, discarded in the mud. My family was left in tatters.
Now a girl claiming to be Lydia is nervously sipping tea at our kitchen counter. I want to believe her like our mother does, but I know she's hiding something.
Why won't Lydia let me into her room? Is it really amnesia stopping her talking about her time away from us? And why does she keep pushing me for details about her childhood illness, as if she doesn't remember how it tore our family apart?
Sneaking into her room, I find a pocket notebook secreted away. Lines and lines of chillingly specific details about our family - things she should know instinctively. Then, one word that shakes me to my core. My suspicions curdle in my gut. Who is the girl sleeping in the room next to me? Am I safe? Is my family?
An absolutely gripping and addictive psychological thriller that will keep you turning the pages until late into the night. If you love The Housemaid, Gone Girl or The Other Daughter, you'll adore Not My Sister.
Readers love Not My Sister:
Wow! Just wow. This book has everything I want in a thriller. A missing girl with loads of secrets, narrators you can never quite trust, and honestly, twists even more impressively executed than in The Housemaid. I was totally gripped throughout... Warning: this book is addictive and will keep you up all night. NetGalley reviewer, ⭐⭐⭐⭐⭐
I was so hooked to the book that I forgot about time. I have read the whole book in 3 days. What a spectacular read it was!!!! My mind is blown, I am so into the characters that I could never predict the twist, it was literally jaw dropping. @tamanna.reads, ⭐⭐⭐⭐⭐
This book hooked me in and never let me go. It had that itchy brilliance that gets into your skin and you almost want to read quicker than your actual eyes can do so. Goodreads reviewer, ⭐⭐⭐⭐⭐
What a twist at the end!!!!! Had to lift my jaw off the floor when I got to the twist! Jessica's Book Biz, ⭐⭐⭐⭐⭐
What a read! I finished this book in two days as I couldn't put it down. Just when you think you know what's going on the author throws in another huge twist and has you questioning yourself. Crime Fiction Addict, ⭐⭐⭐⭐⭐
Wow!! The twists and turns in this book were fantastic!! I was hooked the entire way through and I swear I didn't breathe for the last 20 chapters!!! @ryrichards333, ⭐⭐⭐⭐
I absolutely loved Not My Sister. It was so twisty - every time I thought we'd hit the big reveal, something even bigger happened and completely blew my mind... Such a gripping read, I couldn't put it down and loved every minute of it. I think thriller lovers are gonna eat this up!!! @kelshorrordiary, ⭐⭐⭐⭐
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