Parents' Guide to The Blackthorn Key, Book 1

The Blackthorn Key, Book 1 Poster Image

Common Sense Media Review

Mary Eisenhart By Mary Eisenhart , based on child development research. How do we rate?

age 10+

Puzzles, explosions in thrilling 1600s mystery adventure.

Parents Need to Know

Why Age 10+?

Any Positive Content?

Parent and Kid Reviews

age 10+

Based on 2 parent reviews

age 11+

Based on 11 kid reviews

Kids say the book is an engaging read that captivates many with its clever puzzles and humor, though some find its graphic content inappropriate for younger audiences. While most readers appreciate its fast pace and strong messages, a few criticize it as unappealing, particularly for younger or avid readers.

  • inspiring
  • graphic content
  • fast-paced
  • clever puzzles
  • strong messages
Summarized with AI

What's the Story?

It's the spring of 1665, and Charles II is on the throne, though none too securely. Closer to home for 14-year-old apprentice Christopher Rowe is the fact that "in the past four months, five men had been butchered in their homes. Each of them had been tied up, tortured, then slit open at the stomach and left to bleed to death." Then his beloved master, apothecary Benedict Blackthorn, becomes the latest victim, leaving Christopher a note in code inscribed "nemini dixeris" ("tell no one" in Latin). Soon Christopher and his best friend Tom are trying to decipher THE BLACKTHORN KEY, solve the murders, and stay alive as they unearth a plot that threatens not only the king but the entire world.

Is It Any Good?

Our review:
Parents say ( 2 ):
Kids say ( 11 ):

First-time author Kevin Sands delivers irresistible characters, cool knowledge, intrigue, and lots of explosions as a 17th-century apprentice tries to solve his master's murder. Over the course of this exciting page-turner, readers will learn quite a bit about day-to-day life in 17th-century London, secret messages in code and Latin, and chemistry. Purists might quibble about the occasional anachronism, such as referring to characters "aging out" of an orphanage, but it's for a good cause: making a lot of potentially forbidding knowledge not only accessible but also spellbinding.

Parents be warned: There are definite "kids, don't try this at home" moments. It's nothing they can't find on the Web any day, but The Blackthorn Key includes detailed recipes for explosives, particularly gunpowder and something like nitroglycerin. Some of the compounds are described with archaic names such as "aqua fortis" (nitric acid).

Talk to Your Kids About ...

  • Families can talk about stories of kids living in past times. What's the appeal for readers of today? Do you have any favorites?

  • Do you think life has improved for kids and teens today compared with the experiences of Christopher and his friends? Is there anything about their time you'd like to check out yourself if you had the chance?

  • What did you know about Oliver Cromwell and his overthrow of the king? Does this story make you want to learn more about that era?

Book Details

  • Author : Kevin Sands
  • Genre : Adventure
  • Topics : STEM , Adventures , Friendship , History
  • Book type : Fiction
  • Publisher : Aladdin
  • Publication date : September 1, 2015
  • Publisher's recommended age(s) : 10 - 18
  • Number of pages : 384
  • Available on : Nook, Audiobook (unabridged), Hardback, Apple Books, Kindle
  • Last updated : October 9, 2025

Did we miss something on diversity?

Research shows a connection between kids' healthy self-esteem and positive portrayals in media. That's why we've added a new "Diverse Representations" section to our reviews that will be rolling out on an ongoing basis. You can help us help kids by

The Blackthorn Key, Book 1 Poster Image

What to Read Next

Common Sense Media's unbiased ratings are created by expert reviewers and aren't influenced by the product's creators or by any of our funders, affiliates, or partners.

See how we rate