Fantasy

Review: The Other Sister by Theo Baxter

January 21, 2026

Synopsis:

Celeste left her sister behind. Now she’s coming home…

Dr. Celeste Monroe seems to have the perfect life—a thriving psychology practice, bestselling self-help books, and the respect of her peers.

But when patient Daniel St. Clair begins stalking her and releases doctored recordings of their sessions which go viral, Celeste’s career crumbles overnight. As death threats flood in and her reputation disintegrates, she realises that what’s happening in the present may be linked to her own troubled past.

When Celeste was fourteen, her abusive mother was murdered. Celeste testified that her twin sister Leah was the killer and Leah was incarcerated in a mental institution.

Now, under intense scrutiny, Celeste’s past is coming back to haunt her. What really happened the night her mother died? Did Celeste know more than she said? Someone out there seems to think she did and now they’re threatening to destroy her.

As Celeste’s world spirals and her memory begins to fracture, she must confront a terrifying question: What if the fugue states she’s suffered since childhood have been hiding a truth far darker than she ever imagined?

Review:

I’ve read my far share of Thrillers over the years and at a certain point, it is not that easy to produce something completely new to keep me engaged. There were some new elements presented here, while the majority was still predictable, and the ending was not the biggest surprise.

We’re beginning by being introduced to twin sisters, that promised to be there for each other. When the mother is killed and one sister is to blame, we simply accept what is shown to us. That the mother emotionally and physically abused the two of them and used them as an experiment is having implications on the twins.

Then the story picks up by challenging what we know, and we are asked if what was shown in the beginning was really that obvious or if there is more to the story. While the focus was obviously the sisters, the reveal felt a bit lacklustre. Overall, I enjoyed it, but it’s not one I will consider unique.

🌙 Recension: The Other Sister by Theo Baxter
📚 Genre: Psychological Thriller
📅 Release Date: ‎January 18, 2026
📖 Publisher: Inkubator Books
📗 available in various formats – included in Kindle Unlimited
📱 Read as: Kindle
💸 I received a free copy of this book via Booksprout and am voluntarily leaving a review.
🗣️ Language: English
📆 Pages: 264
⭐️ 3.5/5