Survival of the Fittest
Age rating: Ages 13–16 · Teens
Age rating and Christian content guidance for parents.
First published 1997
Two teenage brothers, Frank and Joe Hardy, investigate a series of mysterious events and uncover a criminal conspiracy.
Concern Level
Clean
Virtue Level
Thin
Concern Level
Clean
Virtue Level
Thin
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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 story.
There are descriptions of minor scuffles and danger.
No profanity is used by the characters.
No blasphemous content is present.
No substance abuse is depicted.
No suicide or self-harm is depicted.
The story is not scary.
Occult or witchcraft themes are absent.
No LGBTQ+ themes are present.
The worldview is neutral and focused on problem-solving.
No negative portrayals of Christians exist.
Virtues to celebrate
Higher = stronger presenceFrank and Joe show bravery in pursuing clues.
Faith is not a theme in this book.
Brotherly love and loyalty are evident.
No themes of grace or repentance are present.
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