The sub
Age rating: Ages 14–16 · Teens
Age rating and Christian content guidance for parents.
First published 1993
A young boy named Mark is drawn into a dangerous world of espionage and intrigue when he discovers a hidden message.
Concern Level
Mixed
Virtue Level
Thin
Concern Level
Mixed
Virtue Level
Thin
What is Dokilit?
Dokilit is an AI-powered content guide for Christian parents. We analyse books through the lens of faith and family, then show you the concerns, the virtues, and the conversation points that matter for your home.
Things to consider
Higher = more presentNo sexual content is present in the narrative.
There are scenes of chase and confrontation.
Mild profanity may be present in dialogue.
No blasphemous language is used.
Substance abuse is not a theme in the book.
No suicide or self-harm is depicted.
Some suspenseful moments may be mildly scary.
Occult or witchcraft themes are absent.
No LGBTQ+ themes are present in the story.
The story does not promote a non-Christian worldview.
Christians are not portrayed negatively in the book.
Virtues to celebrate
Higher = stronger presenceMark displays bravery in a dangerous situation.
No explicit Christian faith elements are present.
Mark shows loyalty to his friends.
Mark learns about trust and deception.
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