Calculated · Nova McBee · The Calculated Series #1 · 2021 · ~400 pages · YA thriller / contemporary sci-fi · 4/5 · Shanghai and Seattle · first of four books
Review:
I’m glad to have stumbled upon this underrated gem. The main character, Josephine Rivers, is a child prodigy with a knack for numbers. Mathematics is hidden all around us and we can predict many things using applied mathematics. Josephine’s ability to physically see equations in her surroundings or when she thinks of a situation and calculate them in real time lets her make perfect predictions and take precise decisions. This makes her a target of a criminal mastermind who wants to use her powers for profit.
The book was intriguing from the first page. Shifting the narrative between the past and the present made me hooked. The author manages to subtly weave her knowledge of China into the story. I particularly liked the emphasis on the number 8 and infinity. The character growth, the setting and the philosophical quotes made it an interesting read. It was quite fast paced and did not feel like almost 400 pages.
Even though the story contains heavy subjects of human trafficking, kidnapping, death, abuse and betrayal, it manages not to be graphic. Meanwhile, a wise old friend of the the main character who acts as her mentor teaches her forgiveness, redemption, justice and hope during her dark times. This brings a good balance to the story.
This book resolves the main conflicts and can be read as a standalone, except for the cliffhanger epilogue. I highly recommend this book and look forward to reading the sequels.
The series order
| # | Book | Year | Notes |
|---|---|---|---|
| 1 | Calculated | 2021 | Start here. Shanghai and Seattle; Jo is recruited, renamed, and used |
| 2 | Simulated | 2021 | The story widens beyond the first book’s city; the stakes move from one girl to a network |
| 3 | Activated | 2022 | The team, the mission, and a global disaster in Finland |
| 4 | Liberated | 2026 | The finale. Thailand, a prison, and the organisation behind everything |
Note:
- The series is now four books, not three — oler reviews may call this a trilogy.
- The books were reissued in 2023 with new covers and new ISBNs, so retailer pages show conflicting years — 2021 and 2023 for the same title. The story is the same.
If you liked Calculated:
Because you liked the maths
- The Count of Monte Cristo — Alexandre Dumas. The book’s actual ancestor: identity, revenge, patience, a plan assembled years in advance. Long, and worth it.
- The Inheritance Games — Jennifer Lynn Barnes. Puzzles, codes, a house built as a riddle. Less action, more brain, and very easy to read in one sitting.
Because you liked the teenage spy
- Alex Rider: Stormbreaker — Anthony Horowitz. The original “teenager recruited into adult danger” series, and still the cleanest execution of it.
- The Naturals — Jennifer Lynn Barnes. Teenagers with specific talents used by the FBI. If Jo’s gift was the hook, this is the same hook in a crime-procedural shape.
Because you liked the pace and the politics
- Legend — Marie Lu. A prodigy and a soldier on opposite sides of a divided country. Dual narration, short chapters, high stakes.
- Artemis Fowl — Eoin Colfer. A child genius who is the criminal rather than the target. Funnier, and a useful contrast: what Jo could have become.
The adult version
- The Bourne Identity — Robert Ludlum. Amnesia, identity, a man whose skills are the problem. If Calculated felt like a YA film, this is the grown-up one it is descended from.
FAQ
Is Calculated YA? Yes — YA thriller, aimed at roughly 13 and up. The subject matter is heavy (trafficking, abuse, death) but handled without graphic detail.
How many books are in the Calculated series? Four: Calculated (2021), Simulated (2021), Activated (2022) and Liberated (2026), which is the finale.
Can I read Calculated as a standalone? Yes. The main plot resolves. The epilogue is a cliffhanger, and it is the only reason you have to continue.
Is the mathematics real? It is real mathematics used as a superpower. Jo’s predictive ability is dramatised, not literal — no one is calculating trajectories in their head mid-fight. The pleasure is the idea, not the accuracy.
Is there romance? There is a relationship thread across the series, more prominent in the later books. It is not the point of book one.
Is it appropriate for younger readers? Older middle-grade and up, with the caveats above. If your reader is sensitive to kidnapping and trafficking as subjects, read the first fifty pages yourself first.
Is the film out? No. It is in development as of 2026, with no release date.
Why is this book so hard to find? It was published by a small press, reissued independently in 2023, and never got a large marketing budget. That is the entire reason it is “underrated” — it is not obscure because it is bad.
Posts you may like:
- A Deadly Education — the other YA-adjacent book on the blog with a heroine the system wants to use
- All Systems Red — a gifted narrator who is treated as a resource
- Life Lessons from Harry Potter for Grown-Up Readers — the chosen-one inversion
- 10 Fictional Places Worth Visiting — Shanghai is real, but the book is a place too
- How to Get Out of a Reading Slump — the recommendation for “I need something fast”
