- Chapter Books
- Ages 10–13
- Historical Fiction
The Assassin's Curse
Book 3 of 6 in The Blackthorn KeyView the full series
Christopher's code-breaking uncovers an assassination plot, sending him and his friends to the court of Louis XIV to investigate an ancient curse on the French throne. A darker, richer entry stuffed with ciphers, the Knights Templar and royal intrigue.
- Best for10–13
- FormatChapter
The vibe
What it’s like.
Style
- Literary
- Conversational
Tone
- Exciting
- Suspenseful
- Dark
- Adventurous
Themes
Experience meters
What’s it about?
The story.
When Christopher Rowe cracks a cipher that reveals the true target of an assassination attempt, King Charles II himself sends him, Tom, Sally and the pigeon Bridget across the Channel to the dazzling, dangerous court of Louis XIV. There they must investigate a centuries-old curse on the French crown - a legend that promises an ancient treasure to whoever succeeds in killing the king. As the plot deepens, Christopher finds himself unpicking a trail of coded poems, the secret history of the Knights Templar and a famous painting, with the whole royal family, and his own friends, at stake. Kevin Sands takes his award-winning apothecary out of London for the first time, and the change of scene comes with a darker edge: the danger is closer, the betrayals sharper and the death toll higher. A twisty historical thriller for confident older middle-graders who love codes, history and genuine peril.
Fit check
Right for your child?
Where it lands by age
A 10-13 historical thriller pitched at confident independent readers, and noticeably darker than the first two books - assassination, betrayal and death are central. It reads aloud from about 9 for families happy with the content, and its cryptography and history give it real adult crossover appeal.
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- Best fit · 10–13
- Read aloud · 9–12
- Independent · 10–13
Prose load
Moderate
Visual support
None
Reluctant-reader friendly
Workable
Read-aloud quality
Workable
Preview before sharing if a child is sensitive to: violence, death of character, scary imagery.
Bedtime suitability
1 / 5 · Wide awake
Sensitive-child
1 / 5 · Tough fit
Graphic intensity
3 / 5 · Some
Best for
- Historical mystery
- Codes and puzzles
- Adventure with danger
- Confident readers
Avoid if
- Wants gentle bedtime
- Sensitive to violence
- Sensitive to death
Particularly good for children who are…
- Interested in science
Why it lands
Why they love it.
Why kids love it
This time Christopher's puzzles carry a royal court on his shoulders, and the trail runs through secret Templar history and a cipher hidden in a painting. Swapping London for the glittering, treacherous palace of Louis XIV raises the stakes, and readers say it's the darkest, most gripping book yet.
- Being a detective
- Trickery and cleverness
- Surviving danger
- Adventure and freedom
Why parents love it
The series keeps getting cleverer: this one folds real French court history and cryptography into a genuine thriller, and rewards a reader who likes to work the puzzles alongside the hero. The darker tone and rising body count make it a top-of-the-band read, but the intelligence is real.
- Great writing
- Educational for adult too
- Conversation starter
In the series
The Blackthorn Key.
6 books · open the series →
About the author
Kevin Sands.
If you liked this
Three ways out of this book.
If you liked this, try…
Lateral matches. Same shelf, different texture.
Come into this from…
Easier or preparing reads — perfect lead-ins.
Where to go next…
Escalation reads — a step up in scale, silliness, or stakes.
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